Average First Frost Dates for Ontario

About First Frost Dates in Ontario

Average First Frost dates vary in the Province of Ontario depending on latitude, elevation and proximity to the Great Lakes. The Far Northern areas of Ontario experience the earliest first frost occurring in mid August while Southern areas along the shores of Lake Ontario and Lake Erie eperience first frost in mid to late October. First Frost Dates were calculated using daily climate data from the period between 1991-2020.

Map List Related Pages

Interactive Map of Average First Frost Dates for Ontario

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List of Average First Frost Dates for Locations in Ontario

LocationAverage First Frost Dates
ActonOctober 1 - 10
Actons CornersOctober 11 - 20
AjaxOctober 11 - 20
AlexandriaOctober 1 - 10
AllanburgOctober 21 - 31
AllistonOctober 11 - 20
AlmonteSeptember 21 - 30
AmherstburgOctober 21 - 31
AngusOctober 11 - 20
ArnpriorSeptember 21 - 30
ArthurOctober 1 - 10
AuroraOctober 11 - 20
AylmerOctober 11 - 20
AzildaOctober 1 - 10
BalaOctober 11 - 20
BallantraeOctober 11 - 20
BallinafadOctober 1 - 10
BancroftSeptember 21 - 30
BarrieOctober 11 - 20
Barry's BaySeptember 21 - 30
BaysvilleSeptember 21 - 30
BeetonOctober 11 - 20
Belle RiverOctober 21 - 31
BellevilleOctober 11 - 20
BelmontOctober 11 - 20
BlenheimOctober 21 - 31
Blind RiverOctober 1 - 10
BowmanvilleOctober 11 - 20
BracebridgeOctober 1 - 10
BradfordOctober 11 - 20
BramptonOctober 11 - 20
BranchtonOctober 1 - 10
BrantfordOctober 21 - 31
BrightonOctober 1 - 10
BrockvilleOctober 11 - 20
BrooklinOctober 11 - 20
Bruce MinesOctober 11 - 20
BurlingtonNovember 1 - 10
CaledonOctober 11 - 20
CaledoniaNovember 1 - 10
CambridgeOctober 1 - 10
CapreolOctober 1 - 10
Carleton PlaceSeptember 21 - 30
CarlisleOctober 21 - 31
Carlow/MayoSeptember 21 - 30
CartierSeptember 21 - 30
CasselmanOctober 1 - 10
CayugaNovember 1 - 10
CFB PetawawaSeptember 21 - 30
ChathamOctober 21 - 31
ChelmsfordOctober 1 - 10
ChesleyOctober 11 - 20
Clarence-RocklandSeptember 21 - 30
ClintonOctober 11 - 20
CobaltSeptember 21 - 30
CobourgOctober 1 - 10
CochraneSeptember 1 - 10
CollingwoodOctober 11 - 20
CornwallOctober 11 - 20
CorunnaOctober 21 - 31
CourticeOctober 11 - 20
CourtlandOctober 11 - 20
Deep RiverOctober 1 - 10
DelhiOctober 11 - 20
DeserontoOctober 11 - 20
DorchesterOctober 11 - 20
DorsetSeptember 21 - 30
DowlingOctober 1 - 10
DresdenOctober 21 - 31
DrydenSeptember 21 - 30
DubreuilvilleSeptember 11 - 20
DundasNovember 1 - 10
DunnvilleOctober 21 - 31
DurhamOctober 1 - 10
Ear FallsSeptember 21 - 30
Elliot LakeSeptember 21 - 30
ElmiraOctober 1 - 10
ElmvaleOctober 11 - 20
EmbrunOctober 1 - 10
EmeryvilleOctober 21 - 31
EmoSeptember 21 - 30
EnglehartSeptember 11 - 20
ErinOctober 1 - 10
ErnestownOctober 11 - 20
EspanolaSeptember 21 - 30
EssexOctober 21 - 31
ExeterOctober 11 - 20
Fenelon FallsOctober 1 - 10
Fennells CornerOctober 11 - 20
FergusOctober 1 - 10
FordwichOctober 1 - 10
Fort AlbanyAugust 11 - 20
Fort ErieOctober 11 - 20
Fort FrancesSeptember 11 - 20
Fort SevernAugust 11 - 20
FreeltonOctober 11 - 20
GaltOctober 1 - 10
GananoqueOctober 1 - 10
GeorgetownOctober 1 - 10
GeraldtonSeptember 11 - 20
GlencoeOctober 11 - 20
GoderichOctober 11 - 20
GogamaSeptember 11 - 20
GraftonOctober 1 - 10
GravenhurstOctober 11 - 20
GrimsbyOctober 21 - 31
GuelphOctober 1 - 10
HagersvilleOctober 21 - 31
HaileyburySeptember 21 - 30
HaliburtonSeptember 11 - 20
HamiltonNovember 1 - 10
HanmerOctober 1 - 10
HanoverOctober 1 - 10
HarrowOctober 21 - 31
HarrowsmithOctober 1 - 10
HawkesburySeptember 21 - 30
HearstSeptember 11 - 20
HespelerOctober 1 - 10
Holland LandingOctober 11 - 20
Huron ShoresOctober 11 - 20
IgnaceSeptember 21 - 30
IngersollOctober 11 - 20
InglesideOctober 1 - 10
IngolfSeptember 11 - 20
Iron BridgeOctober 11 - 20
Iroquois FallsSeptember 1 - 10
KapuskasingSeptember 11 - 20
KapuskasingSeptember 11 - 20
KearneySeptember 21 - 30
KemptvilleOctober 1 - 10
KenoraSeptember 21 - 30
KeswickOctober 11 - 20
KincardineOctober 11 - 20
King CityOctober 11 - 20
KingstonOctober 11 - 20
Kirkland LakeSeptember 1 - 10
KitchenerOctober 1 - 10
LakefieldOctober 1 - 10
LanarkSeptember 21 - 30
LansdowneOctober 11 - 20
LaSalleOctober 21 - 31
LeamingtonOctober 21 - 31
LefaivreSeptember 11 - 20
LevackSeptember 21 - 30
LimerickOctober 1 - 10
LincolnOctober 21 - 31
LindsayOctober 1 - 10
ListowelOctober 1 - 10
Little CurrentSeptember 21 - 30
LondonOctober 11 - 20
LonglacSeptember 11 - 20
MacTierOctober 11 - 20
MarathonSeptember 21 - 30
MarkhamOctober 11 - 20
MarmoraOctober 1 - 10
Marten Falls First NationSeptember 11 - 20
MasseySeptember 21 - 30
MatachewanSeptember 11 - 20
MattawaOctober 1 - 10
MaynoothSeptember 11 - 20
MeafordOctober 11 - 20
MerrickvilleOctober 1 - 10
MetcalfeOctober 1 - 10
MidlandOctober 11 - 20
MiltonOctober 11 - 20
MindenSeptember 21 - 30
MississaugaOctober 21 - 31
MitchellOctober 11 - 20
MoosoneeAugust 11 - 20
MorrisburgOctober 1 - 10
Mount AlbertOctober 11 - 20
Mount ForestOctober 1 - 10
NapaneeOctober 11 - 20
New HamburgOctober 1 - 10
New LiskeardSeptember 21 - 30
NewcastleOctober 11 - 20
NewmarketOctober 11 - 20
Niagara FallsOctober 21 - 31
Niagara-on-the-LakeOctober 21 - 31
NipigonSeptember 1 - 10
North CobaltSeptember 21 - 30
NorthshoreSeptember 21 - 30
NorwichOctober 11 - 20
OakvilleNovember 1 - 10
OnapingSeptember 21 - 30
OrangevilleOctober 1 - 10
OrilliaOctober 11 - 20
OshawaOctober 11 - 20
OttawaOctober 1 - 10
Owen SoundOctober 11 - 20
PaisleyOctober 11 - 20
PalmerstonOctober 1 - 10
ParisOctober 11 - 20
Parry SoundOctober 11 - 20
PeawanuckAugust 11 - 20
PelhamOctober 21 - 31
PembrokeSeptember 21 - 30
PenetanguisheneOctober 11 - 20
PerthOctober 1 - 10
PetawawaSeptember 21 - 30
PeterboroughOctober 1 - 10
PetroliaOctober 21 - 31
PickeringOctober 11 - 20
PictonOctober 11 - 20
PikangikumSeptember 21 - 30
Pleasant PointOctober 1 - 10
Port CarlingOctober 11 - 20
Port ColborneOctober 21 - 31
Port DoverOctober 21 - 31
Port ElginOctober 11 - 20
Port HopeOctober 1 - 10
Port LambtonOctober 21 - 31
Port PerryOctober 11 - 20
Port StanleyOctober 11 - 20
PowassanOctober 1 - 10
PrescottOctober 1 - 10
PrestonOctober 1 - 10
Prince Edward CountyOctober 11 - 20
QueensvilleOctober 11 - 20
RamaOctober 11 - 20
Red LakeSeptember 21 - 30
Red RockSeptember 11 - 20
RenfrewSeptember 21 - 30
Richmond HillOctober 11 - 20
RidgetownOctober 11 - 20
RocktonOctober 11 - 20
RockwoodOctober 1 - 10
RussellOctober 1 - 10
SalfordOctober 11 - 20
Sandy LakeSeptember 21 - 30
SarniaOctober 21 - 31
Sauble BeachOctober 11 - 20
Sault Ste. MarieOctober 1 - 10
SchreiberSeptember 11 - 20
SeaforthOctober 11 - 20
ShannonvilleOctober 11 - 20
SheffieldOctober 11 - 20
ShelburneOctober 1 - 10
SimcoeOctober 21 - 31
Sioux NarrowsSeptember 21 - 30
SkeadOctober 1 - 10
Smiths FallsOctober 1 - 10
Smooth Rock FallsSeptember 11 - 20
South MiddletonOctober 11 - 20
SouthamptonOctober 11 - 20
St ThomasOctober 11 - 20
St. CatharinesOctober 21 - 31
St. MarysOctober 11 - 20
StaynerOctober 11 - 20
Stoney CreekNovember 1 - 10
StouffvilleOctober 11 - 20
StratfordOctober 11 - 20
StrathroyOctober 11 - 20
Sturgeon FallsOctober 1 - 10
SudburyOctober 1 - 10
SuttonOctober 1 - 10
Sutton WestOctober 1 - 10
TavistockOctober 1 - 10
TecumsehOctober 21 - 31
TemagamiOctober 1 - 10
Temiskaming ShoresSeptember 21 - 30
Terrace BaySeptember 21 - 30
ThessalonOctober 11 - 20
ThornburyOctober 11 - 20
ThoroldOctober 21 - 31
Thunder BaySeptember 21 - 30
TillsonburgOctober 11 - 20
TimminsSeptember 1 - 10
TorontoNovember 1 - 10
TrentonOctober 1 - 10
Tudor and CashelOctober 1 - 10
TweedOctober 1 - 10
TyendinagaOctober 11 - 20
UxbridgeOctober 1 - 10
Val CaronOctober 1 - 10
Val ThereseOctober 1 - 10
VandorfOctober 11 - 20
VaughanOctober 11 - 20
Victoria HarbourOctober 11 - 20
Wainfleet TownshipOctober 21 - 31
WalkertonOctober 11 - 20
WallaceburgOctober 21 - 31
Wasaga BeachOctober 11 - 20
WaterdownNovember 1 - 10
WaterfordOctober 21 - 31
WaterlooOctober 1 - 10
WawaSeptember 11 - 20
WellandOctober 21 - 31
West Lincoln TownshipOctober 21 - 31
WheatleyOctober 21 - 31
WhitbyOctober 11 - 20
WiartonOctober 11 - 20
WilliamsburgOctober 1 - 10
WinchesterOctober 1 - 10
WindsorOctober 21 - 31
WinonaNovember 1 - 10
WollastonSeptember 21 - 30
WoodstockOctober 11 - 20

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