Williams Iowa Climate Data

Monthly Average Climate Data for Williams Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.7 °F25.8 °F0.89 in.
February12.6 °F30.5 °F1.01 in.
March24.5 °F43.5 °F2.05 in.
April35.6 °F58.3 °F3.84 in.
May48.8 °F69.9 °F5.05 in.
June59.5 °F80.0 °F5.97 in.
July62.5 °F82.6 °F4.44 in.
August59.5 °F80.5 °F4.42 in.
September50.3 °F74.7 °F3.21 in.
October38.1 °F61.5 °F2.56 in.
November26.0 °F45.1 °F1.75 in.
December15.1 °F31.5 °F1.44 in.
Annual36.8 °F57 °F36.63 in.

Climate Data for Williams Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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