Willowbrook Illinois Climate Data

Monthly Average Climate Data for Willowbrook Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.8 °C0 °C56.9 mm
February-7.3 °C2.2 °C53.85 mm
March-2.1 °C8.7 °C60.96 mm
April3.7 °C15.8 °C101.85 mm
May9.8 °C21.9 °C122.94 mm
June15.4 °C27.4 °C114.3 mm
July18 °C29.8 °C104.65 mm
August17.2 °C28.7 °C105.92 mm
September12.8 °C25.1 °C83.82 mm
October6 °C17.7 °C90.68 mm
November-0.1 °C9.3 °C65.02 mm
December-5.6 °C2.6 °C58.17 mm
Annual4.9 °C15.8 °C1019.06 mm

Climate Data for Willowbrook Illinois

Average First Frost DateOct. 21 - Oct. 31
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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