Dexter Iowa Climate Data

Monthly Average Climate Data for Dexter Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.9 °F30.0 °F0.89 in.
February16.1 °F35.1 °F1.18 in.
March26.7 °F47.9 °F2.03 in.
April38.0 °F61.3 °F3.67 in.
May50.0 °F71.5 °F5.01 in.
June60.2 °F80.9 °F5.1 in.
July64.2 °F84.7 °F4.19 in.
August61.6 °F83.0 °F4.02 in.
September52.8 °F76.7 °F3.51 in.
October40.4 °F63.9 °F2.69 in.
November28.2 °F48.2 °F1.82 in.
December17.5 °F35.0 °F1.32 in.
Annual39 °F59.9 °F35.43 in.

Climate Data for Dexter Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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