Riverwoods Illinois Climate Data

Monthly Average Climate Data for Riverwoods Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F31.3 °F2.12 in.
February19.9 °F35.0 °F2.01 in.
March28.8 °F45.3 °F2.28 in.
April39.0 °F56.9 °F3.82 in.
May49.8 °F68.5 °F4.41 in.
June59.9 °F78.7 °F4.39 in.
July65.5 °F83.2 °F3.74 in.
August64.3 °F81.5 °F3.92 in.
September56.4 °F74.9 °F3.38 in.
October44.4 °F62.2 °F3.31 in.
November32.9 °F48.1 °F2.44 in.
December23.1 °F36.6 °F2.12 in.
Annual41.8 °F58.5 °F37.94 in.

Climate Data for Riverwoods 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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