Williamsburg Iowa Climate Data

Monthly Average Climate Data for Williamsburg Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.2 °C-1.7 °C29.46 mm
February-9.1 °C1 °C35.31 mm
March-2.9 °C8.3 °C55.37 mm
April3.2 °C15.9 °C91.69 mm
May10.1 °C22.1 °C124.21 mm
June15.8 °C27.3 °C124.21 mm
July17.7 °C29.1 °C108.97 mm
August16.2 °C28.2 °C111.25 mm
September11.2 °C24.7 °C90.17 mm
October4.6 °C17.4 °C72.14 mm
November-2.1 °C8.7 °C53.85 mm
December-7.8 °C1.4 °C42.16 mm
Annual3.8 °C15.2 °C938.79 mm

Climate Data for Williamsburg 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 : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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