Iowa 2012 USDA Hardiness Zone Map
View the new 2023 Iowa Hardiness Zone Map
| Zone 4b -25°F to -20°F | Zone 5a -20°F to -15°F | Zone 5b -15°F to -10°F | Zone 6a -10°F to -5°F |
Based on the 2012 USDA Hardiness Zone Map, this interactive version covers the state of Iowa which ranges from USDA Zone 4b to USDA Zone 6a.
2012 USDA Hardiness Zone Maps for Neighboring States and Provinces
Related Iowa Maps:
List of 2012 Hardiness Zones for Cities in Iowa
| Location | Hardiness Zone |
|---|---|
| Ackley | Zone 5a: -20°F to -15°F |
| Ackworth | Zone 5a: -20°F to -15°F |
| Adair | Zone 5a: -20°F to -15°F |
| Adel | Zone 5a: -20°F to -15°F |
| Afton | Zone 5a: -20°F to -15°F |
| Agency | Zone 5b: -15°F to -10°F |
| Ainsworth | Zone 5b: -15°F to -10°F |
| Akron | Zone 5a: -20°F to -15°F |
| Albert City | Zone 5a: -20°F to -15°F |
| Albia | Zone 5b: -15°F to -10°F |
| Albion | Zone 5a: -20°F to -15°F |
| Alburnett | Zone 5a: -20°F to -15°F |
| Alden | Zone 5a: -20°F to -15°F |
| Alexander | Zone 5a: -20°F to -15°F |
| Algona | Zone 5a: -20°F to -15°F |
| Alleman | Zone 5a: -20°F to -15°F |
| Allendorf | Zone 4b: -25°F to -20°F |
| Allerton | Zone 5b: -15°F to -10°F |
| Allison | Zone 5a: -20°F to -15°F |
| Alta | Zone 5a: -20°F to -15°F |
| Alta Vista | Zone 5a: -20°F to -15°F |
| Alton | Zone 5a: -20°F to -15°F |
| Altoona | Zone 5a: -20°F to -15°F |
| Alvord | Zone 4b: -25°F to -20°F |
| Amana | Zone 5a: -20°F to -15°F |
| Ames | Zone 5a: -20°F to -15°F |
| Anamosa | Zone 5a: -20°F to -15°F |
| Anderson | Zone 5b: -15°F to -10°F |
| Andover | Zone 5a: -20°F to -15°F |
| Andrew | Zone 5a: -20°F to -15°F |
| Anita | Zone 5a: -20°F to -15°F |
| Ankeny | Zone 5a: -20°F to -15°F |
| Anthon | Zone 5a: -20°F to -15°F |
| Aplington | Zone 5a: -20°F to -15°F |
| Arcadia | Zone 5a: -20°F to -15°F |
| Archer | Zone 4b: -25°F to -20°F |
| Aredale | Zone 5a: -20°F to -15°F |
| Argyle | Zone 5b: -15°F to -10°F |
| Arion | Zone 5a: -20°F to -15°F |
| Arispe | Zone 5b: -15°F to -10°F |
| Arlington | Zone 4b: -25°F to -20°F |
| Armstrong | Zone 5a: -20°F to -15°F |
| Arnolds Park | Zone 5a: -20°F to -15°F |
| Arthur | Zone 5a: -20°F to -15°F |
| Asbury | Zone 5a: -20°F to -15°F |
| Ashton | Zone 4b: -25°F to -20°F |
| Aspinwall | Zone 5a: -20°F to -15°F |
| Atalissa | Zone 5b: -15°F to -10°F |
| Athelstan | Zone 5b: -15°F to -10°F |
| Atkins | Zone 5a: -20°F to -15°F |
| Atlantic | Zone 5a: -20°F to -15°F |
| Auburn | Zone 5a: -20°F to -15°F |
| Audubon | Zone 5a: -20°F to -15°F |
| Aurelia | Zone 5a: -20°F to -15°F |
| Aurora | Zone 5a: -20°F to -15°F |
| Austinville | Zone 5a: -20°F to -15°F |
| Avoca | Zone 5a: -20°F to -15°F |
| Ayrshire | Zone 5a: -20°F to -15°F |
| Badger | Zone 5a: -20°F to -15°F |
| Bagley | Zone 5a: -20°F to -15°F |
| Baldwin | Zone 5a: -20°F to -15°F |
| Balltown | Zone 5a: -20°F to -15°F |
| Bancroft | Zone 5a: -20°F to -15°F |
| Bankston | Zone 5a: -20°F to -15°F |
| Barnes City | Zone 5a: -20°F to -15°F |
| Barnum | Zone 5a: -20°F to -15°F |
| Bartlett | Zone 5b: -15°F to -10°F |
| Bassett | Zone 5a: -20°F to -15°F |
| Batavia | Zone 5b: -15°F to -10°F |
| Battle Creek | Zone 5a: -20°F to -15°F |
| Baxter | Zone 5a: -20°F to -15°F |
| Bayard | Zone 5a: -20°F to -15°F |
| Beacon | Zone 5b: -15°F to -10°F |
| Beaconsfield | Zone 5b: -15°F to -10°F |
| Beaman | Zone 5a: -20°F to -15°F |
| Beaver | Zone 5a: -20°F to -15°F |
| Beaverdale | Zone 5b: -15°F to -10°F |
| Bedford | Zone 5a: -20°F to -15°F |
| Belle Plaine | Zone 5a: -20°F to -15°F |
| Bellevue | Zone 5a: -20°F to -15°F |
| Belmond | Zone 5a: -20°F to -15°F |
| Bennett | Zone 5a: -20°F to -15°F |
| Bentley | Zone 5a: -20°F to -15°F |
| Benton | Zone 5b: -15°F to -10°F |
| Berkley | Zone 5a: -20°F to -15°F |
| Bernard | Zone 5a: -20°F to -15°F |
| Bertram | Zone 5a: -20°F to -15°F |
| Berwick | Zone 5a: -20°F to -15°F |
| Bettendorf | Zone 5b: -15°F to -10°F |
| Bevington | Zone 5a: -20°F to -15°F |
| Birmingham | Zone 5b: -15°F to -10°F |
| Blairsburg | Zone 5a: -20°F to -15°F |
| Blairstown | Zone 5a: -20°F to -15°F |
| Blakesburg | Zone 5b: -15°F to -10°F |
| Blanchard | Zone 5b: -15°F to -10°F |
| Blencoe | Zone 5a: -20°F to -15°F |
| Blencoe | Zone 5a: -20°F to -15°F |
| Blockton | Zone 5b: -15°F to -10°F |
| Bloomfield | Zone 5b: -15°F to -10°F |
| Blue Grass | Zone 5b: -15°F to -10°F |
| Bode | Zone 5a: -20°F to -15°F |
| Bolan | Zone 5a: -20°F to -15°F |
| Bonaparte | Zone 5b: -15°F to -10°F |
| Bondurant | Zone 5a: -20°F to -15°F |
| Boone | Zone 5a: -20°F to -15°F |
| Booneville | Zone 5a: -20°F to -15°F |
| Bouton | Zone 5a: -20°F to -15°F |
| Boxholm | Zone 5a: -20°F to -15°F |
| Boyden | Zone 4b: -25°F to -20°F |
| Boyer | Zone 5a: -20°F to -15°F |
| Braddyville | Zone 5b: -15°F to -10°F |
| Bradford | Zone 5a: -20°F to -15°F |
| Bradgate | Zone 5a: -20°F to -15°F |
| Brandon | Zone 5a: -20°F to -15°F |
| Brayton | Zone 5a: -20°F to -15°F |
| Breda | Zone 5a: -20°F to -15°F |
| Bridgewater | Zone 5a: -20°F to -15°F |
| Brighton | Zone 5b: -15°F to -10°F |
| Bristow | Zone 5a: -20°F to -15°F |
| Britt | Zone 5a: -20°F to -15°F |
| Bronson | Zone 5a: -20°F to -15°F |
| Brooklyn | Zone 5a: -20°F to -15°F |
| Brunsville | Zone 5a: -20°F to -15°F |
| Bryant | Zone 5a: -20°F to -15°F |
| Buck Grove | Zone 5a: -20°F to -15°F |
| Buckeye | Zone 5a: -20°F to -15°F |
| Buckingham | Zone 5a: -20°F to -15°F |
| Buffalo | Zone 5b: -15°F to -10°F |
| Buffalo Center | Zone 5a: -20°F to -15°F |
| Burchinal | Zone 5a: -20°F to -15°F |
| Burlington | Zone 5b: -15°F to -10°F |
| Burnside | Zone 5a: -20°F to -15°F |
| Burr Oak | Zone 4b: -25°F to -20°F |
| Burt | Zone 5a: -20°F to -15°F |
| Bussey | Zone 5b: -15°F to -10°F |
| Calamus | Zone 5b: -15°F to -10°F |
| California Junction | Zone 5a: -20°F to -15°F |
| Callender | Zone 5a: -20°F to -15°F |
| Calmar | Zone 4b: -25°F to -20°F |
| Calumet | Zone 5a: -20°F to -15°F |
| Camanche | Zone 5b: -15°F to -10°F |
| Cambridge | Zone 5a: -20°F to -15°F |
| Cantril | Zone 5b: -15°F to -10°F |
| Carbon | Zone 5a: -20°F to -15°F |
| Carlisle | Zone 5a: -20°F to -15°F |
| Carpenter | Zone 4b: -25°F to -20°F |
| Carroll | Zone 5a: -20°F to -15°F |
| Carson | Zone 5a: -20°F to -15°F |
| Carter Lake | Zone 5b: -15°F to -10°F |
| Cascade | Zone 5a: -20°F to -15°F |
| Casey | Zone 5a: -20°F to -15°F |
| Castalia | Zone 4b: -25°F to -20°F |
| Castana | Zone 5a: -20°F to -15°F |
| Cedar | Zone 5b: -15°F to -10°F |
| Cedar Falls | Zone 5a: -20°F to -15°F |
| Cedar Rapids | Zone 5a: -20°F to -15°F |
| Center Junction | Zone 5a: -20°F to -15°F |
| Center Point | Zone 5a: -20°F to -15°F |
| Centerville | Zone 5b: -15°F to -10°F |
| Central City | Zone 5a: -20°F to -15°F |
| Centralia | Zone 5a: -20°F to -15°F |
| Chapin | Zone 5a: -20°F to -15°F |
| Chariton | Zone 5a: -20°F to -15°F |
| Charles City | Zone 5a: -20°F to -15°F |
| Charlotte | Zone 5a: -20°F to -15°F |
| Charter Oak | Zone 5a: -20°F to -15°F |
| Chatsworth | Zone 5a: -20°F to -15°F |
| Chelsea | Zone 5a: -20°F to -15°F |
| Cherokee | Zone 5a: -20°F to -15°F |
| Chester | Zone 4b: -25°F to -20°F |
| Chillicothe | Zone 5b: -15°F to -10°F |
| Churdan | Zone 5a: -20°F to -15°F |
| Cincinnati | Zone 5b: -15°F to -10°F |
| Clare | Zone 5a: -20°F to -15°F |
| Clarence | Zone 5a: -20°F to -15°F |
| Clarinda | Zone 5b: -15°F to -10°F |
| Clarion | Zone 5a: -20°F to -15°F |
| Clarksville | Zone 5a: -20°F to -15°F |
| Clayton | Zone 5a: -20°F to -15°F |
| Clear Lake | Zone 5a: -20°F to -15°F |
| Clearfield | Zone 5a: -20°F to -15°F |
| Cleghorn | Zone 5a: -20°F to -15°F |
| Clemons | Zone 5a: -20°F to -15°F |
| Clermont | Zone 5a: -20°F to -15°F |
| Climbing Hill | Zone 5a: -20°F to -15°F |
| Clinton | Zone 5b: -15°F to -10°F |
| Clinton Stock Yards | Zone 5b: -15°F to -10°F |
| Clio | Zone 5b: -15°F to -10°F |
| Clive | Zone 5a: -20°F to -15°F |
| Clutier | Zone 5a: -20°F to -15°F |
| Coalville | Zone 5a: -20°F to -15°F |
| Coburg | Zone 5b: -15°F to -10°F |
| Coggon | Zone 5a: -20°F to -15°F |
| Coin | Zone 5b: -15°F to -10°F |
| Colesburg | Zone 5a: -20°F to -15°F |
| Colfax | Zone 5a: -20°F to -15°F |
| College Springs | Zone 5b: -15°F to -10°F |
| Collins | Zone 5a: -20°F to -15°F |
| Colo | Zone 5a: -20°F to -15°F |
| Columbia | Zone 5b: -15°F to -10°F |
| Columbus City | Zone 5b: -15°F to -10°F |
| Columbus Jct | Zone 5b: -15°F to -10°F |
| Columbus Junction | Zone 5b: -15°F to -10°F |
| Colwell | Zone 5a: -20°F to -15°F |
| Conesville | Zone 5b: -15°F to -10°F |
| Conrad | Zone 5a: -20°F to -15°F |
| Conroy | Zone 5a: -20°F to -15°F |
| Conway | Zone 5a: -20°F to -15°F |
| Coon Rapids | Zone 5a: -20°F to -15°F |
| Cooper | Zone 5a: -20°F to -15°F |
| Coppock | Zone 5b: -15°F to -10°F |
| Coralville | Zone 5b: -15°F to -10°F |
| Corley | Zone 5a: -20°F to -15°F |
| Corning | Zone 5a: -20°F to -15°F |
| Correctionville | Zone 5a: -20°F to -15°F |
| Corwith | Zone 5a: -20°F to -15°F |
| Corydon | Zone 5b: -15°F to -10°F |
| Cotter | Zone 5b: -15°F to -10°F |
| Coulter | Zone 5a: -20°F to -15°F |
| Council Bluffs | Zone 5b: -15°F to -10°F |
| Craig | Zone 4b: -25°F to -20°F |
| Crawfordsville | Zone 5b: -15°F to -10°F |
| Crescent | Zone 5b: -15°F to -10°F |
| Cresco | Zone 4b: -25°F to -20°F |
| Creston | Zone 5a: -20°F to -15°F |
| Cromwell | Zone 5a: -20°F to -15°F |
| Crystal Lake | Zone 5a: -20°F to -15°F |
| Cumberland | Zone 5a: -20°F to -15°F |
| Cumming | Zone 5a: -20°F to -15°F |
| Curlew | Zone 5a: -20°F to -15°F |
| Cushing | Zone 5a: -20°F to -15°F |
| Cylinder | Zone 5a: -20°F to -15°F |
| Dakota City | Zone 5a: -20°F to -15°F |
| Dallas | Zone 5b: -15°F to -10°F |
| Dallas Center | Zone 5a: -20°F to -15°F |
| Dana | Zone 5a: -20°F to -15°F |
| Danbury | Zone 5a: -20°F to -15°F |
| Danville | Zone 5b: -15°F to -10°F |
| Davenport | Zone 5b: -15°F to -10°F |
| Davis City | Zone 5b: -15°F to -10°F |
| Dawson | Zone 5a: -20°F to -15°F |
| Dayton | Zone 5a: -20°F to -15°F |
| De Soto | Zone 5a: -20°F to -15°F |
| De Witt | Zone 5a: -20°F to -15°F |
| Decatur | Zone 5b: -15°F to -10°F |
| Decorah | Zone 4b: -25°F to -20°F |
| Dedham | Zone 5a: -20°F to -15°F |
| Deep River | Zone 5a: -20°F to -15°F |
| Defiance | Zone 5a: -20°F to -15°F |
| Delaware | Zone 5a: -20°F to -15°F |
| Delhi | Zone 5a: -20°F to -15°F |
| Delmar | Zone 5a: -20°F to -15°F |
| Deloit | Zone 5a: -20°F to -15°F |
| Delphos | Zone 5b: -15°F to -10°F |
| Delta | Zone 5b: -15°F to -10°F |
| Denison | Zone 5a: -20°F to -15°F |
| Denmark | Zone 5b: -15°F to -10°F |
| Denver | Zone 5a: -20°F to -15°F |
| Derby | Zone 5b: -15°F to -10°F |
| Des Moines | Zone 5b: -15°F to -10°F |
| Dewar | Zone 5a: -20°F to -15°F |
| Dexter | Zone 5a: -20°F to -15°F |
| Diagonal | Zone 5b: -15°F to -10°F |
| Dickens | Zone 5a: -20°F to -15°F |
| Dike | Zone 5a: -20°F to -15°F |
| Dixon | Zone 5b: -15°F to -10°F |
| Dolliver | Zone 5a: -20°F to -15°F |
| Donahue | Zone 5b: -15°F to -10°F |
| Donnan | Zone 4b: -25°F to -20°F |
| Donnellson | Zone 5b: -15°F to -10°F |
| Doon | Zone 4b: -25°F to -20°F |
| Dorchester | Zone 4b: -25°F to -20°F |
| Douds | Zone 5b: -15°F to -10°F |
| Dougherty | Zone 5a: -20°F to -15°F |
| Dow City | Zone 5a: -20°F to -15°F |
| Dows | Zone 5a: -20°F to -15°F |
| Drakesville | Zone 5b: -15°F to -10°F |
| Dubuque | Zone 5a: -20°F to -15°F |
| Dumont | Zone 5a: -20°F to -15°F |
| Duncan | Zone 5a: -20°F to -15°F |
| Duncombe | Zone 5a: -20°F to -15°F |
| Dundee | Zone 5a: -20°F to -15°F |
| Dunkerton | Zone 5a: -20°F to -15°F |
| Dunlap | Zone 5a: -20°F to -15°F |
| Durango | Zone 5a: -20°F to -15°F |
| Durant | Zone 5b: -15°F to -10°F |
| Dyersville | Zone 5a: -20°F to -15°F |
| Dysart | Zone 5a: -20°F to -15°F |
| Eagle Grove | Zone 5a: -20°F to -15°F |
| Earlham | Zone 5a: -20°F to -15°F |
| Earling | Zone 5a: -20°F to -15°F |
| Earlville | Zone 5a: -20°F to -15°F |
| Early | Zone 5a: -20°F to -15°F |
| East Amana | Zone 5a: -20°F to -15°F |
| East Peru | Zone 5a: -20°F to -15°F |
| East Pleasant Plain | Zone 5b: -15°F to -10°F |
| Eddyville | Zone 5b: -15°F to -10°F |
| Edgewood | Zone 4b: -25°F to -20°F |
| Elberon | Zone 5a: -20°F to -15°F |
| Eldon | Zone 5b: -15°F to -10°F |
| Eldora | Zone 5a: -20°F to -15°F |
| Eldridge | Zone 5b: -15°F to -10°F |
| Elgin | Zone 5a: -20°F to -15°F |
| Elk Horn | Zone 5a: -20°F to -15°F |
| Elk Run Heights | Zone 5a: -20°F to -15°F |
| Elkader | Zone 4b: -25°F to -20°F |
| Elkhart | Zone 5a: -20°F to -15°F |
| Elkport | Zone 5a: -20°F to -15°F |
| Elliott | Zone 5a: -20°F to -15°F |
| Ellston | Zone 5b: -15°F to -10°F |
| Ellsworth | Zone 5a: -20°F to -15°F |
| Elma | Zone 4b: -25°F to -20°F |
| Elwood | Zone 5a: -20°F to -15°F |
| Ely | Zone 5a: -20°F to -15°F |
| Emerson | Zone 5b: -15°F to -10°F |
| Emmetsburg | Zone 5a: -20°F to -15°F |
| Epworth | Zone 5a: -20°F to -15°F |
| Essex | Zone 5b: -15°F to -10°F |
| Estherville | Zone 5a: -20°F to -15°F |
| Evansdale | Zone 5a: -20°F to -15°F |
| Everly | Zone 5a: -20°F to -15°F |
| Exira | Zone 5a: -20°F to -15°F |
| Exline | Zone 5b: -15°F to -10°F |
| Fairbank | Zone 5a: -20°F to -15°F |
| Fairfax | Zone 5a: -20°F to -15°F |
| Fairfield | Zone 5b: -15°F to -10°F |
| Farley | Zone 5a: -20°F to -15°F |
| Farmersburg | Zone 4b: -25°F to -20°F |
| Farmington | Zone 5b: -15°F to -10°F |
| Farnhamville | Zone 5a: -20°F to -15°F |
| Farragut | Zone 5b: -15°F to -10°F |
| Fayette | Zone 4b: -25°F to -20°F |
| Fenton | Zone 5a: -20°F to -15°F |
| Ferguson | Zone 5a: -20°F to -15°F |
| Fertile | Zone 5a: -20°F to -15°F |
| Floris | Zone 5b: -15°F to -10°F |
| Floyd | Zone 5a: -20°F to -15°F |
| Fonda | Zone 5a: -20°F to -15°F |
| Fontanelle | Zone 5a: -20°F to -15°F |
| Forest City | Zone 5a: -20°F to -15°F |
| Fort Atkinson | Zone 4b: -25°F to -20°F |
| Fort Dodge | Zone 5a: -20°F to -15°F |
| Fort Madison | Zone 5b: -15°F to -10°F |
| Fostoria | Zone 5a: -20°F to -15°F |
| Franklin | Zone 5b: -15°F to -10°F |
| Fraser | Zone 5a: -20°F to -15°F |
| Fredericksburg | Zone 5a: -20°F to -15°F |
| Frederika | Zone 5a: -20°F to -15°F |
| Fredonia | Zone 5b: -15°F to -10°F |
| Fremont | Zone 5b: -15°F to -10°F |
| Fruitland | Zone 5b: -15°F to -10°F |
| Frytown | Zone 5b: -15°F to -10°F |
| Galt | Zone 5a: -20°F to -15°F |
| Galva | Zone 5a: -20°F to -15°F |
| Garber | Zone 5a: -20°F to -15°F |
| Garden City | Zone 5a: -20°F to -15°F |
| Garden Grove | Zone 5a: -20°F to -15°F |
| Garnavillo | Zone 5a: -20°F to -15°F |
| Garner | Zone 5a: -20°F to -15°F |
| Garrison | Zone 5a: -20°F to -15°F |
| Garwin | Zone 5a: -20°F to -15°F |
| Geneva | Zone 5a: -20°F to -15°F |
| George | Zone 4b: -25°F to -20°F |
| Gibson | Zone 5a: -20°F to -15°F |
| Gifford | Zone 5a: -20°F to -15°F |
| Gilbert | Zone 5a: -20°F to -15°F |
| Gilbertville | Zone 5a: -20°F to -15°F |
| Gillett Grove | Zone 5a: -20°F to -15°F |
| Gilman | Zone 5a: -20°F to -15°F |
| Gilmore City | Zone 5a: -20°F to -15°F |
| Gladbrook | Zone 5a: -20°F to -15°F |
| Glenwood | Zone 5a: -20°F to -15°F |
| Glidden | Zone 5a: -20°F to -15°F |
| Goldfield | Zone 5a: -20°F to -15°F |
| Goodell | Zone 5a: -20°F to -15°F |
| Goose Lake | Zone 5a: -20°F to -15°F |
| Gowrie | Zone 5a: -20°F to -15°F |
| Graettinger | Zone 5a: -20°F to -15°F |
| Graf | Zone 5a: -20°F to -15°F |
| Grafton | Zone 5a: -20°F to -15°F |
| Grand Junction | Zone 5a: -20°F to -15°F |
| Grand Mound | Zone 5a: -20°F to -15°F |
| Grand River | Zone 5b: -15°F to -10°F |
| Grandview | Zone 5b: -15°F to -10°F |
| Granger | Zone 5a: -20°F to -15°F |
| Grant | Zone 5a: -20°F to -15°F |
| Granville | Zone 4b: -25°F to -20°F |
| Gravity | Zone 5a: -20°F to -15°F |
| Gray | Zone 5a: -20°F to -15°F |
| Greeley | Zone 4b: -25°F to -20°F |
| Green Island | Zone 5a: -20°F to -15°F |
| Green Mountain | Zone 5a: -20°F to -15°F |
| Greene | Zone 5a: -20°F to -15°F |
| Greenfield | Zone 5b: -15°F to -10°F |
| Greenville | Zone 5a: -20°F to -15°F |
| Grimes | Zone 5a: -20°F to -15°F |
| Grinnell | Zone 5a: -20°F to -15°F |
| Griswold | Zone 5a: -20°F to -15°F |
| Grundy Center | Zone 5a: -20°F to -15°F |
| Gruver | Zone 5a: -20°F to -15°F |
| Guernsey | Zone 5a: -20°F to -15°F |
| Guthrie Center | Zone 5a: -20°F to -15°F |
| Guttenberg | Zone 5a: -20°F to -15°F |
| Halbur | Zone 5a: -20°F to -15°F |
| Hamburg | Zone 5b: -15°F to -10°F |
| Hamilton | Zone 5b: -15°F to -10°F |
| Hamlin | Zone 5a: -20°F to -15°F |
| Hampton | Zone 5a: -20°F to -15°F |
| Hancock | Zone 5a: -20°F to -15°F |
| Hanlontown | Zone 5a: -20°F to -15°F |
| Hansell | Zone 5a: -20°F to -15°F |
| Harcourt | Zone 5a: -20°F to -15°F |
| Hardy | Zone 5a: -20°F to -15°F |
| Harlan | Zone 5a: -20°F to -15°F |
| Harper | Zone 5b: -15°F to -10°F |
| Harpers Ferry | Zone 5a: -20°F to -15°F |
| Harris | Zone 4b: -25°F to -20°F |
| Hartford | Zone 5b: -15°F to -10°F |
| Hartley | Zone 5a: -20°F to -15°F |
| Hartwick | Zone 5a: -20°F to -15°F |
| Harvey | Zone 5b: -15°F to -10°F |
| Hastings | Zone 5b: -15°F to -10°F |
| Havelock | Zone 5a: -20°F to -15°F |
| Haverhill | Zone 5a: -20°F to -15°F |
| Hawarden | Zone 5a: -20°F to -15°F |
| Hawkeye | Zone 4b: -25°F to -20°F |
| Hayesville | Zone 5b: -15°F to -10°F |
| Hayfield | Zone 5a: -20°F to -15°F |
| Hazleton | Zone 5a: -20°F to -15°F |
| Hedrick | Zone 5b: -15°F to -10°F |
| Henderson | Zone 5a: -20°F to -15°F |
| Hepburn | Zone 5b: -15°F to -10°F |
| Hiawatha | Zone 5a: -20°F to -15°F |
| High Amana | Zone 5a: -20°F to -15°F |
| Highlandville | Zone 4b: -25°F to -20°F |
| Hills | Zone 5b: -15°F to -10°F |
| Hillsboro | Zone 5b: -15°F to -10°F |
| Hinton | Zone 5a: -20°F to -15°F |
| Holland | Zone 5a: -20°F to -15°F |
| Holstein | Zone 5a: -20°F to -15°F |
| Holy Cross | Zone 5a: -20°F to -15°F |
| Homestead | Zone 5a: -20°F to -15°F |
| Honey Creek | Zone 5b: -15°F to -10°F |
| Hopkinton | Zone 5a: -20°F to -15°F |
| Hornick | Zone 5a: -20°F to -15°F |
| Hospers | Zone 4b: -25°F to -20°F |
| Houghton | Zone 5b: -15°F to -10°F |
| Hubbard | Zone 5a: -20°F to -15°F |
| Hudson | Zone 5a: -20°F to -15°F |
| Hull | Zone 4b: -25°F to -20°F |
| Humboldt | Zone 5a: -20°F to -15°F |
| Humeston | Zone 5b: -15°F to -10°F |
| Hutchins | Zone 5a: -20°F to -15°F |
| Huxley | Zone 5a: -20°F to -15°F |
| Ida Grove | Zone 5a: -20°F to -15°F |
| Imogene | Zone 5b: -15°F to -10°F |
| Independence | Zone 5a: -20°F to -15°F |
| Indianola | Zone 5a: -20°F to -15°F |
| Inwood | Zone 4b: -25°F to -20°F |
| Ionia | Zone 5a: -20°F to -15°F |
| Iowa City | Zone 5b: -15°F to -10°F |
| Iowa Falls | Zone 5a: -20°F to -15°F |
| Ira | Zone 5a: -20°F to -15°F |
| Ireton | Zone 4b: -25°F to -20°F |
| Irvington | Zone 5a: -20°F to -15°F |
| Irwin | Zone 5a: -20°F to -15°F |
| Jackson Junction | Zone 4b: -25°F to -20°F |
| Jacksonville | Zone 5a: -20°F to -15°F |
| Jamaica | Zone 5a: -20°F to -15°F |
| Janesville | Zone 5a: -20°F to -15°F |
| Jefferson | Zone 5a: -20°F to -15°F |
| Jesup | Zone 5a: -20°F to -15°F |
| Jewell | Zone 5a: -20°F to -15°F |
| Johnston | Zone 5a: -20°F to -15°F |
| Joice | Zone 5a: -20°F to -15°F |
| Jolley | Zone 5a: -20°F to -15°F |
| Kalona | Zone 5b: -15°F to -10°F |
| Kamrar | Zone 5a: -20°F to -15°F |
| Kanawha | Zone 5a: -20°F to -15°F |
| Kellerton | Zone 5b: -15°F to -10°F |
| Kelley | Zone 5a: -20°F to -15°F |
| Kellogg | Zone 5a: -20°F to -15°F |
| Kensett | Zone 5a: -20°F to -15°F |
| Kent | Zone 5a: -20°F to -15°F |
| Keokuk | Zone 6a: -10°F to -5°F |
| Keomah Village | Zone 5b: -15°F to -10°F |
| Keosauqua | Zone 5b: -15°F to -10°F |
| Keota | Zone 5b: -15°F to -10°F |
| Kesley | Zone 5a: -20°F to -15°F |
| Keswick | Zone 5a: -20°F to -15°F |
| Keystone | Zone 5a: -20°F to -15°F |
| Killduff | Zone 5a: -20°F to -15°F |
| Kimballton | Zone 5a: -20°F to -15°F |
| Kingsley | Zone 5a: -20°F to -15°F |
| Kinross | Zone 5b: -15°F to -10°F |
| Kirkman | Zone 5a: -20°F to -15°F |
| Kirkville | Zone 5b: -15°F to -10°F |
| Kiron | Zone 5a: -20°F to -15°F |
| Klemme | Zone 5a: -20°F to -15°F |
| Knierim | Zone 5a: -20°F to -15°F |
| Knoxville | Zone 5b: -15°F to -10°F |
| La Motte | Zone 5a: -20°F to -15°F |
| La Porte City | Zone 5a: -20°F to -15°F |
| Lacona | Zone 5b: -15°F to -10°F |
| Ladora | Zone 5a: -20°F to -15°F |
| Lake City | Zone 5a: -20°F to -15°F |
| Lake Mills | Zone 5a: -20°F to -15°F |
| Lake Park | Zone 5a: -20°F to -15°F |
| Lake View | Zone 5a: -20°F to -15°F |
| Lakeside | Zone 5a: -20°F to -15°F |
| Lakota | Zone 5a: -20°F to -15°F |
| Lambs Grove | Zone 5b: -15°F to -10°F |
| Lamoni | Zone 5b: -15°F to -10°F |
| Lamont | Zone 5a: -20°F to -15°F |
| Lanesboro | Zone 5a: -20°F to -15°F |
| Langworthy | Zone 5a: -20°F to -15°F |
| Lansing | Zone 5a: -20°F to -15°F |
| Larchwood | Zone 4b: -25°F to -20°F |
| Larrabee | Zone 5a: -20°F to -15°F |
| Latimer | Zone 5a: -20°F to -15°F |
| Laurel | Zone 5a: -20°F to -15°F |
| Laurens | Zone 5a: -20°F to -15°F |
| Lawler | Zone 5a: -20°F to -15°F |
| Lawton | Zone 5a: -20°F to -15°F |
| Le Claire | Zone 5b: -15°F to -10°F |
| Le Grand | Zone 5a: -20°F to -15°F |
| Le Mars | Zone 5a: -20°F to -15°F |
| Le Roy | Zone 5b: -15°F to -10°F |
| Leando | Zone 5b: -15°F to -10°F |
| Ledyard | Zone 5a: -20°F to -15°F |
| Lehigh | Zone 5a: -20°F to -15°F |
| Leighton | Zone 5b: -15°F to -10°F |
| Leland | Zone 5a: -20°F to -15°F |
| Lenox | Zone 5a: -20°F to -15°F |
| Leon | Zone 5b: -15°F to -10°F |
| Lester | Zone 4b: -25°F to -20°F |
| Letts | Zone 5b: -15°F to -10°F |
| Lewis | Zone 5a: -20°F to -15°F |
| Liberty Center | Zone 5a: -20°F to -15°F |
| Libertyville | Zone 5b: -15°F to -10°F |
| Lidderdale | Zone 5a: -20°F to -15°F |
| Lime Springs | Zone 4b: -25°F to -20°F |
| Lincoln | Zone 5a: -20°F to -15°F |
| Linden | Zone 5a: -20°F to -15°F |
| Lineville | Zone 5b: -15°F to -10°F |
| Linn Grove | Zone 5a: -20°F to -15°F |
| Lisbon | Zone 5a: -20°F to -15°F |
| Liscomb | Zone 5a: -20°F to -15°F |
| Little Cedar | Zone 5a: -20°F to -15°F |
| Little Rock | Zone 4b: -25°F to -20°F |
| Little Sioux | Zone 5a: -20°F to -15°F |
| Littleport | Zone 4b: -25°F to -20°F |
| Livermore | Zone 5a: -20°F to -15°F |
| Lockridge | Zone 5b: -15°F to -10°F |
| Logan | Zone 5a: -20°F to -15°F |
| Lohrville | Zone 5a: -20°F to -15°F |
| Lone Rock | Zone 5a: -20°F to -15°F |
| Lone Tree | Zone 5b: -15°F to -10°F |
| Long Grove | Zone 5b: -15°F to -10°F |
| Lorimor | Zone 5a: -20°F to -15°F |
| Lost Nation | Zone 5a: -20°F to -15°F |
| Loveland | Zone 5a: -20°F to -15°F |
| Lovilia | Zone 5b: -15°F to -10°F |
| Low Moor | Zone 5b: -15°F to -10°F |
| Lowden | Zone 5a: -20°F to -15°F |
| Lu Verne | Zone 5a: -20°F to -15°F |
| Luana | Zone 4b: -25°F to -20°F |
| Lucas | Zone 5b: -15°F to -10°F |
| Luther | Zone 5a: -20°F to -15°F |
| Luxemburg | Zone 5a: -20°F to -15°F |
| Luzerne | Zone 5a: -20°F to -15°F |
| Lynnville | Zone 5a: -20°F to -15°F |
| Lytton | Zone 5a: -20°F to -15°F |
| Macedonia | Zone 5a: -20°F to -15°F |
| Macksburg | Zone 5a: -20°F to -15°F |
| Madrid | Zone 5a: -20°F to -15°F |
| Magnolia | Zone 5a: -20°F to -15°F |
| Maharishi Vedic City | Zone 5b: -15°F to -10°F |
| Malcom | Zone 5a: -20°F to -15°F |
| Mallard | Zone 5a: -20°F to -15°F |
| Maloy | Zone 5b: -15°F to -10°F |
| Malvern | Zone 5b: -15°F to -10°F |
| Manchester | Zone 5a: -20°F to -15°F |
| Manilla | Zone 5a: -20°F to -15°F |
| Manly | Zone 5a: -20°F to -15°F |
| Manning | Zone 5a: -20°F to -15°F |
| Manson | Zone 5a: -20°F to -15°F |
| Mapleton | Zone 5a: -20°F to -15°F |
| Maquoketa | Zone 5a: -20°F to -15°F |
| Marathon | Zone 5a: -20°F to -15°F |
| Marble Rock | Zone 5a: -20°F to -15°F |
| Marcus | Zone 4b: -25°F to -20°F |
| Marengo | Zone 5a: -20°F to -15°F |
| Marion | Zone 5a: -20°F to -15°F |
| Marne | Zone 5a: -20°F to -15°F |
| Marquette | Zone 5a: -20°F to -15°F |
| Marshalltown | Zone 5a: -20°F to -15°F |
| Martelle | Zone 5a: -20°F to -15°F |
| Martensdale | Zone 5a: -20°F to -15°F |
| Martinsburg | Zone 5b: -15°F to -10°F |
| Marysville | Zone 5b: -15°F to -10°F |
| Mason City | Zone 5a: -20°F to -15°F |
| Masonville | Zone 5a: -20°F to -15°F |
| Massena | Zone 5a: -20°F to -15°F |
| Matlock | Zone 4b: -25°F to -20°F |
| Maurice | Zone 5a: -20°F to -15°F |
| Maxwell | Zone 5a: -20°F to -15°F |
| May City | Zone 4b: -25°F to -20°F |
| Maynard | Zone 4b: -25°F to -20°F |
| Maysville | Zone 5b: -15°F to -10°F |
| McCallsburg | Zone 5a: -20°F to -15°F |
| McCausland | Zone 5b: -15°F to -10°F |
| McClelland | Zone 5b: -15°F to -10°F |
| McGregor | Zone 5a: -20°F to -15°F |
| McIntire | Zone 4b: -25°F to -20°F |
| Mechanicsville | Zone 5a: -20°F to -15°F |
| Mediapolis | Zone 5b: -15°F to -10°F |
| Melbourne | Zone 5a: -20°F to -15°F |
| Melcher | Zone 5b: -15°F to -10°F |
| Melrose | Zone 5b: -15°F to -10°F |
| Melvin | Zone 4b: -25°F to -20°F |
| Menlo | Zone 5a: -20°F to -15°F |
| Meriden | Zone 5a: -20°F to -15°F |
| Merrill | Zone 5a: -20°F to -15°F |
| Meservey | Zone 5a: -20°F to -15°F |
| Meyer | Zone 4b: -25°F to -20°F |
| Middle Amana | Zone 5a: -20°F to -15°F |
| Middletown | Zone 5b: -15°F to -10°F |
| Miles | Zone 5a: -20°F to -15°F |
| Milford | Zone 5a: -20°F to -15°F |
| Miller | Zone 5a: -20°F to -15°F |
| Millersburg | Zone 5a: -20°F to -15°F |
| Millerton | Zone 5b: -15°F to -10°F |
| Millville | Zone 5a: -20°F to -15°F |
| Milo | Zone 5a: -20°F to -15°F |
| Milton | Zone 5b: -15°F to -10°F |
| Minburn | Zone 5a: -20°F to -15°F |
| Minden | Zone 5a: -20°F to -15°F |
| Mineola | Zone 5b: -15°F to -10°F |
| Mingo | Zone 5a: -20°F to -15°F |
| Missouri Valley | Zone 5a: -20°F to -15°F |
| Mitchell | Zone 5a: -20°F to -15°F |
| Mitchellville | Zone 5a: -20°F to -15°F |
| Modale | Zone 5a: -20°F to -15°F |
| Mona | Zone 4b: -25°F to -20°F |
| Mondamin | Zone 5a: -20°F to -15°F |
| Moneta | Zone 5a: -20°F to -15°F |
| Monmouth | Zone 5a: -20°F to -15°F |
| Monona | Zone 5a: -20°F to -15°F |
| Monroe | Zone 5a: -20°F to -15°F |
| Montezuma | Zone 5a: -20°F to -15°F |
| Monticello | Zone 5a: -20°F to -15°F |
| Montour | Zone 5a: -20°F to -15°F |
| Montpelier | Zone 5b: -15°F to -10°F |
| Montrose | Zone 5b: -15°F to -10°F |
| Moorhead | Zone 5a: -20°F to -15°F |
| Moorland | Zone 5a: -20°F to -15°F |
| Moravia | Zone 5b: -15°F to -10°F |
| Morley | Zone 5a: -20°F to -15°F |
| Morning Sun | Zone 5b: -15°F to -10°F |
| Morrison | Zone 5a: -20°F to -15°F |
| Moscow | Zone 5b: -15°F to -10°F |
| Moulton | Zone 5b: -15°F to -10°F |
| Mount Auburn | Zone 5a: -20°F to -15°F |
| Mount Ayr | Zone 5b: -15°F to -10°F |
| Mount Pleasant | Zone 5b: -15°F to -10°F |
| Mount Sterling | Zone 5b: -15°F to -10°F |
| Mount Union | Zone 5b: -15°F to -10°F |
| Mount Vernon | Zone 5a: -20°F to -15°F |
| Moville | Zone 5a: -20°F to -15°F |
| Murray | Zone 5b: -15°F to -10°F |
| Muscatine | Zone 5b: -15°F to -10°F |
| Mystic | Zone 5b: -15°F to -10°F |
| Nashua | Zone 5a: -20°F to -15°F |
| Nemaha | Zone 5a: -20°F to -15°F |
| Neola | Zone 5a: -20°F to -15°F |
| Nevada | Zone 5a: -20°F to -15°F |
| New Albin | Zone 5a: -20°F to -15°F |
| New Hampton | Zone 5a: -20°F to -15°F |
| New Hartford | Zone 5a: -20°F to -15°F |
| New Haven | Zone 5a: -20°F to -15°F |
| New Liberty | Zone 5b: -15°F to -10°F |
| New London | Zone 5b: -15°F to -10°F |
| New Market | Zone 5b: -15°F to -10°F |
| New Providence | Zone 5a: -20°F to -15°F |
| New Sharon | Zone 5a: -20°F to -15°F |
| New Vienna | Zone 5a: -20°F to -15°F |
| New Virginia | Zone 5b: -15°F to -10°F |
| Newell | Zone 5a: -20°F to -15°F |
| Newhall | Zone 5a: -20°F to -15°F |
| Newton | Zone 5b: -15°F to -10°F |
| Nichols | Zone 5b: -15°F to -10°F |
| Nodaway | Zone 5b: -15°F to -10°F |
| Nora Springs | Zone 5a: -20°F to -15°F |
| North Buena Vista | Zone 5a: -20°F to -15°F |
| North English | Zone 5a: -20°F to -15°F |
| North Liberty | Zone 5b: -15°F to -10°F |
| North Washington | Zone 5a: -20°F to -15°F |
| Northboro | Zone 5b: -15°F to -10°F |
| Northwood | Zone 4b: -25°F to -20°F |
| Norwalk | Zone 5b: -15°F to -10°F |
| Norway | Zone 5a: -20°F to -15°F |
| Numa | Zone 5b: -15°F to -10°F |
| Oakdale | Zone 5b: -15°F to -10°F |
| Oakland | Zone 5a: -20°F to -15°F |
| Oakland Acres | Zone 5a: -20°F to -15°F |
| Oakville | Zone 5b: -15°F to -10°F |
| Ocheyedan | Zone 4b: -25°F to -20°F |
| Odebolt | Zone 5a: -20°F to -15°F |
| Oelwein | Zone 5a: -20°F to -15°F |
| Ogden | Zone 5a: -20°F to -15°F |
| Okoboji | Zone 5a: -20°F to -15°F |
| Olds | Zone 5b: -15°F to -10°F |
| Olin | Zone 5a: -20°F to -15°F |
| Ollie | Zone 5b: -15°F to -10°F |
| Onawa | Zone 5a: -20°F to -15°F |
| Oneida | Zone 4b: -25°F to -20°F |
| Onslow | Zone 5a: -20°F to -15°F |
| Oran | Zone 5a: -20°F to -15°F |
| Orange City | Zone 5a: -20°F to -15°F |
| Orchard | Zone 5a: -20°F to -15°F |
| Orient | Zone 5a: -20°F to -15°F |
| Orleans | Zone 5a: -20°F to -15°F |
| Osage | Zone 5a: -20°F to -15°F |
| Osceola | Zone 5b: -15°F to -10°F |
| Oskaloosa | Zone 5b: -15°F to -10°F |
| Ossian | Zone 4b: -25°F to -20°F |
| Osterdock | Zone 5a: -20°F to -15°F |
| Otho | Zone 5a: -20°F to -15°F |
| Otley | Zone 5b: -15°F to -10°F |
| Oto | Zone 5a: -20°F to -15°F |
| Otranto | Zone 4b: -25°F to -20°F |
| Ottosen | Zone 5a: -20°F to -15°F |
| Ottumwa | Zone 5b: -15°F to -10°F |
| Owasa | Zone 5a: -20°F to -15°F |
| Oxford | Zone 5a: -20°F to -15°F |
| Oxford Junction | Zone 5a: -20°F to -15°F |
| Oyens | Zone 5a: -20°F to -15°F |
| Pacific Junction | Zone 5a: -20°F to -15°F |
| Packwood | Zone 5b: -15°F to -10°F |
| Palmer | Zone 5a: -20°F to -15°F |
| Palo | Zone 5a: -20°F to -15°F |
| Panama | Zone 5a: -20°F to -15°F |
| Panora | Zone 5a: -20°F to -15°F |
| Panorama Park | Zone 5b: -15°F to -10°F |
| Park View | Zone 5b: -15°F to -10°F |
| Parkersburg | Zone 5a: -20°F to -15°F |
| Parnell | Zone 5a: -20°F to -15°F |
| Paton | Zone 5a: -20°F to -15°F |
| Patterson | Zone 5a: -20°F to -15°F |
| Paullina | Zone 4b: -25°F to -20°F |
| Pella | Zone 5b: -15°F to -10°F |
| Peosta | Zone 5a: -20°F to -15°F |
| Percival | Zone 5b: -15°F to -10°F |
| Perry | Zone 5a: -20°F to -15°F |
| Persia | Zone 5a: -20°F to -15°F |
| Peru | Zone 5a: -20°F to -15°F |
| Peterson | Zone 5a: -20°F to -15°F |
| Pierson | Zone 5a: -20°F to -15°F |
| Pilot Grove | Zone 5b: -15°F to -10°F |
| Pilot Mound | Zone 5a: -20°F to -15°F |
| Pioneer | Zone 5a: -20°F to -15°F |
| Pisgah | Zone 5a: -20°F to -15°F |
| Plainfield | Zone 5a: -20°F to -15°F |
| Plano | Zone 5b: -15°F to -10°F |
| Pleasant Hill | Zone 5b: -15°F to -10°F |
| Pleasant Plain | Zone 5b: -15°F to -10°F |
| Pleasant Valley | Zone 5b: -15°F to -10°F |
| Pleasanton | Zone 5b: -15°F to -10°F |
| Pleasantville | Zone 5b: -15°F to -10°F |
| Plover | Zone 5a: -20°F to -15°F |
| Plymouth | Zone 5a: -20°F to -15°F |
| Pocahontas | Zone 5a: -20°F to -15°F |
| Polk City | Zone 5a: -20°F to -15°F |
| Pomeroy | Zone 5a: -20°F to -15°F |
| Popejoy | Zone 5a: -20°F to -15°F |
| Portland | Zone 5a: -20°F to -15°F |
| Portsmouth | Zone 5a: -20°F to -15°F |
| Postville | Zone 4b: -25°F to -20°F |
| Prairie City | Zone 5a: -20°F to -15°F |
| Prairieburg | Zone 5a: -20°F to -15°F |
| Prescott | Zone 5a: -20°F to -15°F |
| Preston | Zone 5a: -20°F to -15°F |
| Primghar | Zone 4b: -25°F to -20°F |
| Princeton | Zone 5b: -15°F to -10°F |
| Prole | Zone 5a: -20°F to -15°F |
| Promise City | Zone 5b: -15°F to -10°F |
| Protivin | Zone 4b: -25°F to -20°F |
| Pulaski | Zone 5b: -15°F to -10°F |
| Quasqueton | Zone 5a: -20°F to -15°F |
| Quimby | Zone 5a: -20°F to -15°F |
| Radcliffe | Zone 5a: -20°F to -15°F |
| Rake | Zone 4b: -25°F to -20°F |
| Ralston | Zone 5a: -20°F to -15°F |
| Randalia | Zone 4b: -25°F to -20°F |
| Randall | Zone 5a: -20°F to -15°F |
| Randolph | Zone 5b: -15°F to -10°F |
| Rathbun | Zone 5b: -15°F to -10°F |
| Raymond | Zone 5a: -20°F to -15°F |
| Readlyn | Zone 5a: -20°F to -15°F |
| Reasnor | Zone 5a: -20°F to -15°F |
| Red Oak | Zone 5a: -20°F to -15°F |
| Redding | Zone 5b: -15°F to -10°F |
| Redfield | Zone 5a: -20°F to -15°F |
| Reinbeck | Zone 5a: -20°F to -15°F |
| Rembrandt | Zone 5a: -20°F to -15°F |
| Remsen | Zone 5a: -20°F to -15°F |
| Renwick | Zone 5a: -20°F to -15°F |
| Rhodes | Zone 5a: -20°F to -15°F |
| Riceville | Zone 4b: -25°F to -20°F |
| Richland | Zone 5b: -15°F to -10°F |
| Rickardsville | Zone 5a: -20°F to -15°F |
| Ricketts | Zone 5a: -20°F to -15°F |
| Ridgeway | Zone 4b: -25°F to -20°F |
| Rinard | Zone 5a: -20°F to -15°F |
| Ringsted | Zone 5a: -20°F to -15°F |
| Rippey | Zone 5a: -20°F to -15°F |
| River Sioux | Zone 5a: -20°F to -15°F |
| Riverdale | Zone 5b: -15°F to -10°F |
| Riverside | Zone 5b: -15°F to -10°F |
| Riverton | Zone 5b: -15°F to -10°F |
| Robins | Zone 5a: -20°F to -15°F |
| Rochester | Zone 5b: -15°F to -10°F |
| Rock Falls | Zone 5a: -20°F to -15°F |
| Rock Rapids | Zone 4b: -25°F to -20°F |
| Rock Valley | Zone 5a: -20°F to -15°F |
| Rockford | Zone 5a: -20°F to -15°F |
| Rockwell | Zone 5a: -20°F to -15°F |
| Rockwell City | Zone 5a: -20°F to -15°F |
| Rodman | Zone 5a: -20°F to -15°F |
| Rodney | Zone 5a: -20°F to -15°F |
| Roland | Zone 5a: -20°F to -15°F |
| Rolfe | Zone 5a: -20°F to -15°F |
| Rome | Zone 5b: -15°F to -10°F |
| Rose Hill | Zone 5b: -15°F to -10°F |
| Roseville | Zone 5a: -20°F to -15°F |
| Rossie | Zone 5a: -20°F to -15°F |
| Rowan | Zone 5a: -20°F to -15°F |
| Rowley | Zone 5a: -20°F to -15°F |
| Royal | Zone 5a: -20°F to -15°F |
| Rudd | Zone 5a: -20°F to -15°F |
| Runnells | Zone 5b: -15°F to -10°F |
| Russell | Zone 5a: -20°F to -15°F |
| Ruthven | Zone 5a: -20°F to -15°F |
| Rutland | Zone 5a: -20°F to -15°F |
| Ryan | Zone 5a: -20°F to -15°F |
| Sabula | Zone 5a: -20°F to -15°F |
| Sac City | Zone 5a: -20°F to -15°F |
| Sageville | Zone 5a: -20°F to -15°F |
| Saint Ansgar | Zone 5a: -20°F to -15°F |
| Saint Anthony | Zone 5a: -20°F to -15°F |
| Saint Benedict | Zone 5a: -20°F to -15°F |
| Saint Charles | Zone 5a: -20°F to -15°F |
| Saint Donatus | Zone 5a: -20°F to -15°F |
| Saint Joseph | Zone 5a: -20°F to -15°F |
| Saint Lucas | Zone 4b: -25°F to -20°F |
| Saint Marys | Zone 5a: -20°F to -15°F |
| Saint Olaf | Zone 4b: -25°F to -20°F |
| Saint Paul | Zone 5b: -15°F to -10°F |
| Salem | Zone 5b: -15°F to -10°F |
| Salix | Zone 5a: -20°F to -15°F |
| Sanborn | Zone 4b: -25°F to -20°F |
| Sandyville | Zone 5a: -20°F to -15°F |
| Saylorville | Zone 5a: -20°F to -15°F |
| Scarville | Zone 5a: -20°F to -15°F |
| Schaller | Zone 5a: -20°F to -15°F |
| Schleswig | Zone 5a: -20°F to -15°F |
| Scranton | Zone 5a: -20°F to -15°F |
| Searsboro | Zone 5a: -20°F to -15°F |
| Selma | Zone 5b: -15°F to -10°F |
| Sergeant Bluff | Zone 5a: -20°F to -15°F |
| Sexton | Zone 5a: -20°F to -15°F |
| Seymour | Zone 5b: -15°F to -10°F |
| Shambaugh | Zone 5b: -15°F to -10°F |
| Shannon City | Zone 5b: -15°F to -10°F |
| Sharpsburg | Zone 5a: -20°F to -15°F |
| Sheffield | Zone 5a: -20°F to -15°F |
| Shelby | Zone 5a: -20°F to -15°F |
| Sheldahl | Zone 5a: -20°F to -15°F |
| Sheldon | Zone 4b: -25°F to -20°F |
| Shell Rock | Zone 5a: -20°F to -15°F |
| Shellsburg | Zone 5a: -20°F to -15°F |
| Shenandoah | Zone 5b: -15°F to -10°F |
| Sherrill | Zone 5a: -20°F to -15°F |
| Shueyville | Zone 5a: -20°F to -15°F |
| Sibley | Zone 4b: -25°F to -20°F |
| Sidney | Zone 5b: -15°F to -10°F |
| Sigourney | Zone 5b: -15°F to -10°F |
| Silver City | Zone 5b: -15°F to -10°F |
| Sioux Center | Zone 5a: -20°F to -15°F |
| Sioux City | Zone 5a: -20°F to -15°F |
| Sioux City | Zone 5a: -20°F to -15°F |
| Sioux Rapids | Zone 5a: -20°F to -15°F |
| Slater | Zone 5a: -20°F to -15°F |
| Sloan | Zone 5a: -20°F to -15°F |
| Smithland | Zone 5a: -20°F to -15°F |
| Soldier | Zone 5a: -20°F to -15°F |
| Solon | Zone 5a: -20°F to -15°F |
| Somers | Zone 5a: -20°F to -15°F |
| South Amana | Zone 5a: -20°F to -15°F |
| South English | Zone 5b: -15°F to -10°F |
| Spencer | Zone 5a: -20°F to -15°F |
| Sperry | Zone 5b: -15°F to -10°F |
| Spillville | Zone 4b: -25°F to -20°F |
| Spirit Lake | Zone 5a: -20°F to -15°F |
| Spragueville | Zone 5a: -20°F to -15°F |
| Spring Hill | Zone 5a: -20°F to -15°F |
| Springbrook | Zone 5a: -20°F to -15°F |
| Springville | Zone 5a: -20°F to -15°F |
| Stacyville | Zone 4b: -25°F to -20°F |
| Stanhope | Zone 5a: -20°F to -15°F |
| Stanley | Zone 5a: -20°F to -15°F |
| Stanton | Zone 5a: -20°F to -15°F |
| Stanwood | Zone 5a: -20°F to -15°F |
| State Center | Zone 5a: -20°F to -15°F |
| Steamboat Rock | Zone 5a: -20°F to -15°F |
| Stockport | Zone 5b: -15°F to -10°F |
| Stockton | Zone 5b: -15°F to -10°F |
| Stone City | Zone 5a: -20°F to -15°F |
| Storm Lake | Zone 5a: -20°F to -15°F |
| Story City | Zone 5a: -20°F to -15°F |
| Stout | Zone 5a: -20°F to -15°F |
| Stratford | Zone 5a: -20°F to -15°F |
| Strawberry Point | Zone 4b: -25°F to -20°F |
| Struble | Zone 5a: -20°F to -15°F |
| Stuart | Zone 5a: -20°F to -15°F |
| Sully | Zone 5a: -20°F to -15°F |
| Sumner | Zone 5a: -20°F to -15°F |
| Sundown Mountain Ski Area | Zone 5a: -20°F to -15°F |
| Superior | Zone 5a: -20°F to -15°F |
| Sutherland | Zone 5a: -20°F to -15°F |
| Swaledale | Zone 5a: -20°F to -15°F |
| Swan | Zone 5b: -15°F to -10°F |
| Swea City | Zone 5a: -20°F to -15°F |
| Swedesburg | Zone 5b: -15°F to -10°F |
| Swisher | Zone 5a: -20°F to -15°F |
| Tabor | Zone 5b: -15°F to -10°F |
| Tama | Zone 5a: -20°F to -15°F |
| Teeds Grove | Zone 5a: -20°F to -15°F |
| Templeton | Zone 5a: -20°F to -15°F |
| Tennant | Zone 5a: -20°F to -15°F |
| Terril | Zone 5a: -20°F to -15°F |
| Thayer | Zone 5a: -20°F to -15°F |
| Thompson | Zone 5a: -20°F to -15°F |
| Thor | Zone 5a: -20°F to -15°F |
| Thornburg | Zone 5a: -20°F to -15°F |
| Thornton | Zone 5a: -20°F to -15°F |
| Thurman | Zone 5b: -15°F to -10°F |
| Tiffin | Zone 5b: -15°F to -10°F |
| Tingley | Zone 5a: -20°F to -15°F |
| Tipton | Zone 5a: -20°F to -15°F |
| Titonka | Zone 5a: -20°F to -15°F |
| Toddville | Zone 5a: -20°F to -15°F |
| Toeterville | Zone 4b: -25°F to -20°F |
| Toledo | Zone 5a: -20°F to -15°F |
| Toronto | Zone 5a: -20°F to -15°F |
| Tracy | Zone 5b: -15°F to -10°F |
| Traer | Zone 5a: -20°F to -15°F |
| Treynor | Zone 5a: -20°F to -15°F |
| Tripoli | Zone 5a: -20°F to -15°F |
| Troy Mills | Zone 5a: -20°F to -15°F |
| Truesdale | Zone 5a: -20°F to -15°F |
| Truro | Zone 5a: -20°F to -15°F |
| Turin | Zone 5a: -20°F to -15°F |
| Udell | Zone 5b: -15°F to -10°F |
| Underwood | Zone 5a: -20°F to -15°F |
| Union | Zone 5a: -20°F to -15°F |
| Unionville | Zone 5b: -15°F to -10°F |
| University Heights | Zone 5b: -15°F to -10°F |
| University Park | Zone 5b: -15°F to -10°F |
| Urbana | Zone 5a: -20°F to -15°F |
| Urbandale | Zone 5a: -20°F to -15°F |
| Ute | Zone 5a: -20°F to -15°F |
| Vail | Zone 5a: -20°F to -15°F |
| Valeria | Zone 5a: -20°F to -15°F |
| Van Horne | Zone 5a: -20°F to -15°F |
| Van Meter | Zone 5a: -20°F to -15°F |
| Van Wert | Zone 5b: -15°F to -10°F |
| Varina | Zone 5a: -20°F to -15°F |
| Ventura | Zone 5a: -20°F to -15°F |
| Victor | Zone 5a: -20°F to -15°F |
| Villisca | Zone 5b: -15°F to -10°F |
| Vincent | Zone 5a: -20°F to -15°F |
| Vining | Zone 5a: -20°F to -15°F |
| Vinton | Zone 5a: -20°F to -15°F |
| Viola | Zone 5a: -20°F to -15°F |
| Volga | Zone 4b: -25°F to -20°F |
| Wadena | Zone 4b: -25°F to -20°F |
| Wahpeton | Zone 5a: -20°F to -15°F |
| Walcott | Zone 5b: -15°F to -10°F |
| Walford | Zone 5a: -20°F to -15°F |
| Walker | Zone 5a: -20°F to -15°F |
| Wall Lake | Zone 5a: -20°F to -15°F |
| Wallingford | Zone 5a: -20°F to -15°F |
| Walnut | Zone 5a: -20°F to -15°F |
| Wapello | Zone 5b: -15°F to -10°F |
| Washburn | Zone 5a: -20°F to -15°F |
| Washington | Zone 5b: -15°F to -10°F |
| Washta | Zone 5a: -20°F to -15°F |
| Waterloo | Zone 5a: -20°F to -15°F |
| Waterville | Zone 5a: -20°F to -15°F |
| Watkins | Zone 5a: -20°F to -15°F |
| Waucoma | Zone 4b: -25°F to -20°F |
| Waukee | Zone 5a: -20°F to -15°F |
| Waukon | Zone 5a: -20°F to -15°F |
| Waverly | Zone 5a: -20°F to -15°F |
| Wayland | Zone 5b: -15°F to -10°F |
| Webb | Zone 5a: -20°F to -15°F |
| Webster | Zone 5b: -15°F to -10°F |
| Webster City | Zone 5a: -20°F to -15°F |
| Weldon | Zone 5b: -15°F to -10°F |
| Wellman | Zone 5b: -15°F to -10°F |
| Wellsburg | Zone 5a: -20°F to -15°F |
| Weltman | Zone 5b: -15°F to -10°F |
| Welton | Zone 5a: -20°F to -15°F |
| Wesley | Zone 5a: -20°F to -15°F |
| West Amana | Zone 5a: -20°F to -15°F |
| West Bend | Zone 5a: -20°F to -15°F |
| West Branch | Zone 5b: -15°F to -10°F |
| West Burlington | Zone 5b: -15°F to -10°F |
| West Chester | Zone 5b: -15°F to -10°F |
| West Des Moines | Zone 5a: -20°F to -15°F |
| West Grove | Zone 5b: -15°F to -10°F |
| West Liberty | Zone 5b: -15°F to -10°F |
| West Okoboji | Zone 5a: -20°F to -15°F |
| West Point | Zone 5b: -15°F to -10°F |
| West Union | Zone 4b: -25°F to -20°F |
| Westfield | Zone 5a: -20°F to -15°F |
| Westgate | Zone 5a: -20°F to -15°F |
| Weston | Zone 5b: -15°F to -10°F |
| Westphalia | Zone 5a: -20°F to -15°F |
| Westside | Zone 5a: -20°F to -15°F |
| Westwood | Zone 5b: -15°F to -10°F |
| Wever | Zone 5b: -15°F to -10°F |
| What Cheer | Zone 5b: -15°F to -10°F |
| Wheatland | Zone 5a: -20°F to -15°F |
| Whiting | Zone 5a: -20°F to -15°F |
| Whittemore | Zone 5a: -20°F to -15°F |
| Whitten | Zone 5a: -20°F to -15°F |
| Willey | Zone 5a: -20°F to -15°F |
| Williams | Zone 5a: -20°F to -15°F |
| Williamsburg | Zone 5a: -20°F to -15°F |
| Williamson | Zone 5a: -20°F to -15°F |
| Wilton | Zone 5b: -15°F to -10°F |
| Windsor Heights | Zone 5b: -15°F to -10°F |
| Winfield | Zone 5b: -15°F to -10°F |
| Winterset | Zone 5a: -20°F to -15°F |
| Winthrop | Zone 5a: -20°F to -15°F |
| Wiota | Zone 5a: -20°F to -15°F |
| Woden | Zone 5a: -20°F to -15°F |
| Woodbine | Zone 5a: -20°F to -15°F |
| Woodburn | Zone 5b: -15°F to -10°F |
| Woodward | Zone 5a: -20°F to -15°F |
| Woolstock | Zone 5a: -20°F to -15°F |
| Worthington | Zone 5a: -20°F to -15°F |
| Wyoming | Zone 5a: -20°F to -15°F |
| Yale | Zone 5a: -20°F to -15°F |
| Yarmouth | Zone 5b: -15°F to -10°F |
| Yetter | Zone 5a: -20°F to -15°F |
| Yorktown | Zone 5b: -15°F to -10°F |
| Zearing | Zone 5a: -20°F to -15°F |
| Zwingle | Zone 5a: -20°F to -15°F |