Henderson Illinois Climate Data

Monthly Average Climate Data for Henderson Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F30.6 °F1.72 in.
February17.6 °F35.2 °F1.91 in.
March28.0 °F48.3 °F2.44 in.
April38.7 °F61.3 °F3.83 in.
May50.9 °F72.1 °F5.11 in.
June60.7 °F81.0 °F4.73 in.
July64.0 °F83.9 °F4.0 in.
August61.7 °F82.3 °F3.7 in.
September53.4 °F76.4 °F3.82 in.
October41.7 °F63.8 °F2.88 in.
November30.2 °F48.7 °F2.45 in.
December20.2 °F36.0 °F2.01 in.
Annual40.1 °F60 °F38.6 in.

Climate Data for Henderson Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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