Hamilton Iowa Climate Data

Monthly Average Climate Data for Hamilton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.2 °F30.7 °F1.13 in.
February17.0 °F35.4 °F1.49 in.
March27.8 °F48.8 °F2.14 in.
April39.3 °F61.6 °F3.86 in.
May51.3 °F71.5 °F5.18 in.
June61.5 °F81.3 °F5.18 in.
July65.1 °F85.2 °F4.25 in.
August62.7 °F83.3 °F4.16 in.
September53.9 °F76.4 °F3.61 in.
October41.7 °F63.9 °F2.65 in.
November29.7 °F48.6 °F2.08 in.
December19.1 °F36.3 °F1.43 in.
Annual40.2 °F60.3 °F37.16 in.

Climate Data for Hamilton Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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