Wheaton Illinois Climate Data

Monthly Average Climate Data for Wheaton Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.5 °F31.0 °F2.11 in.
February18.1 °F35.0 °F2.05 in.
March27.6 °F46.7 °F2.34 in.
April38.0 °F59.5 °F3.89 in.
May49.0 °F70.9 °F4.89 in.
June59.0 °F80.6 °F4.55 in.
July63.8 °F84.6 °F3.78 in.
August62.2 °F82.5 °F4.14 in.
September54.2 °F76.1 °F3.35 in.
October42.0 °F62.9 °F3.51 in.
November31.0 °F48.3 °F2.59 in.
December21.2 °F36.2 °F2.25 in.
Annual40.1 °F59.5 °F39.45 in.

Climate Data for Wheaton 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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