Williamsville Illinois Climate Data

Monthly Average Climate Data for Williamsville Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.5 °C1.7 °C53.34 mm
February-5.8 °C4.3 °C49.02 mm
March-0.6 °C10.8 °C67.82 mm
April5.4 °C17.9 °C102.87 mm
May11.8 °C23.4 °C115.06 mm
June16.9 °C28.2 °C115.06 mm
July18.6 °C29.9 °C96.52 mm
August17.5 °C29.1 °C87.63 mm
September12.8 °C26.2 °C82.3 mm
October6.3 °C19.2 °C83.57 mm
November0.3 °C11.1 °C74.42 mm
December-4.5 °C4.4 °C55.63 mm
Annual5.9 °C17.2 °C983.24 mm

Climate Data for Williamsville Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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