Wilmington Illinois Climate Data

Monthly Average Climate Data for Wilmington Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9 °C-0.1 °C54.36 mm
February-7.4 °C2.2 °C48.51 mm
March-2.1 °C8.8 °C60.45 mm
April3.7 °C16.1 °C95.25 mm
May10 °C22.2 °C119.63 mm
June15.6 °C27.5 °C117.09 mm
July17.5 °C29.3 °C106.68 mm
August16.4 °C28.3 °C99.31 mm
September12.1 °C25.3 °C85.09 mm
October5.6 °C17.9 °C80.01 mm
November-0.3 °C9.7 °C63.75 mm
December-5.7 °C2.8 °C53.85 mm
Annual4.7 °C15.8 °C983.98 mm

Climate Data for Wilmington Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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