Lombard Illinois Climate Data

Monthly Average Climate Data for Lombard Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F31.4 °F2.15 in.
February18.8 °F35.3 °F2.14 in.
March28.2 °F46.7 °F2.32 in.
April38.5 °F59.4 °F3.89 in.
May49.4 °F70.6 °F4.8 in.
June59.5 °F80.5 °F4.53 in.
July64.5 °F84.7 °F3.76 in.
August63.0 °F82.7 °F4.21 in.
September55.2 °F76.2 °F3.39 in.
October43.0 °F63.0 °F3.49 in.
November31.8 °F48.6 °F2.59 in.
December22.1 °F36.7 °F2.28 in.
Annual40.9 °F59.7 °F39.55 in.

Climate Data for Lombard Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°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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