Coal Valley Illinois Climate Data

Monthly Average Climate Data for Coal Valley Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.3 °F30.4 °F1.58 in.
February17.9 °F34.9 °F1.73 in.
March28.5 °F47.9 °F2.47 in.
April39.6 °F61.2 °F3.67 in.
May51.5 °F72.3 °F4.9 in.
June61.4 °F81.5 °F4.83 in.
July65.1 °F84.5 °F4.24 in.
August62.9 °F82.7 °F3.94 in.
September54.6 °F76.8 °F3.61 in.
October42.9 °F63.9 °F2.89 in.
November30.9 °F48.8 °F2.31 in.
December20.5 °F35.9 °F2.07 in.
Annual40.8 °F60.1 °F38.24 in.

Climate Data for Coal Valley 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 5b : -15°F to -10°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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