Rockdale Illinois Climate Data

Monthly Average Climate Data for Rockdale Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.1 °F31.7 °F2.08 in.
February18.9 °F35.7 °F1.92 in.
March28.5 °F47.6 °F2.41 in.
April39.0 °F60.7 °F3.88 in.
May49.8 °F71.6 °F4.77 in.
June59.9 °F81.0 °F4.62 in.
July63.8 °F84.6 °F4.31 in.
August62.4 °F82.8 °F4.1 in.
September54.6 °F77.1 °F3.4 in.
October42.5 °F63.9 °F3.28 in.
November31.8 °F49.3 °F2.46 in.
December21.9 °F36.9 °F2.12 in.
Annual40.8 °F60.2 °F39.35 in.

Climate Data for Rockdale Illinois

Average First Frost DateOct. 11 - Oct. 20
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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