Countryside Illinois Climate Data

Monthly Average Climate Data for Countryside Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F32.0 °F2.21 in.
February19.9 °F35.8 °F2.1 in.
March29.3 °F47.0 °F2.38 in.
April39.7 °F59.8 °F3.98 in.
May50.5 °F71.0 °F4.84 in.
June60.6 °F81.0 °F4.44 in.
July65.6 °F85.5 °F4.14 in.
August64.3 °F83.4 °F4.17 in.
September56.4 °F76.9 °F3.25 in.
October44.0 °F63.6 °F3.5 in.
November32.8 °F49.1 °F2.54 in.
December22.9 °F37.0 °F2.32 in.
Annual41.9 °F60.2 °F39.87 in.

Climate Data for Countryside Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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