West Chicago Illinois Climate Data

Monthly Average Climate Data for West Chicago Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.9 °F30.8 °F2.04 in.
February17.6 °F34.7 °F1.96 in.
March27.2 °F46.5 °F2.34 in.
April37.6 °F59.4 °F3.82 in.
May48.5 °F70.7 °F4.89 in.
June58.5 °F80.5 °F4.41 in.
July63.2 °F84.5 °F3.76 in.
August61.6 °F82.3 °F4.01 in.
September53.6 °F75.9 °F3.34 in.
October41.6 °F62.7 °F3.48 in.
November30.6 °F48.2 °F2.58 in.
December20.8 °F36.0 °F2.2 in.
Annual39.6 °F59.4 °F38.83 in.

Climate Data for West Chicago Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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