Williamsburg Iowa Climate Data

Monthly Average Climate Data for Williamsburg Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.9 °F29.0 °F1.16 in.
February15.7 °F33.8 °F1.39 in.
March26.8 °F46.9 °F2.18 in.
April37.7 °F60.7 °F3.61 in.
May50.1 °F71.7 °F4.89 in.
June60.5 °F81.1 °F4.89 in.
July63.8 °F84.4 °F4.29 in.
August61.1 °F82.7 °F4.38 in.
September52.1 °F76.5 °F3.55 in.
October40.2 °F63.4 °F2.84 in.
November28.3 °F47.7 °F2.12 in.
December18.0 °F34.5 °F1.66 in.
Annual38.9 °F59.4 °F36.96 in.

Climate Data for Williamsburg 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 5a : -20°F to -15°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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