Henry Illinois Climate Data

Monthly Average Climate Data for Henry Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.3 °F32.3 °F2.0 in.
February19.8 °F36.8 °F1.88 in.
March29.5 °F49.2 °F2.54 in.
April40.0 °F62.9 °F3.76 in.
May51.2 °F73.7 °F4.7 in.
June60.9 °F82.5 °F4.21 in.
July64.6 °F85.6 °F3.85 in.
August62.6 °F84.1 °F3.67 in.
September54.5 °F78.4 °F3.41 in.
October42.9 °F65.8 °F3.03 in.
November31.9 °F50.3 °F2.58 in.
December22.1 °F37.5 °F2.02 in.
Annual41.4 °F61.6 °F37.65 in.

Climate Data for Henry Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°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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