Wilsonville Illinois Climate Data

Monthly Average Climate Data for Wilsonville Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.1 °C2.7 °C64.52 mm
February-4.1 °C5.6 °C57.15 mm
March0.8 °C11.7 °C80.26 mm
April6.7 °C18.3 °C120.9 mm
May12.8 °C23.7 °C128.02 mm
June17.8 °C28.6 °C110.49 mm
July19.7 °C30.2 °C100.58 mm
August18.4 °C29.7 °C88.9 mm
September13.8 °C26.5 °C84.33 mm
October7.4 °C19.8 °C82.55 mm
November1.6 °C11.8 °C88.65 mm
December-3.3 °C5.4 °C66.29 mm
Annual7.1 °C17.8 °C1072.64 mm

Climate Data for Wilsonville Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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