Henry Illinois Climate Data

Monthly Average Climate Data for Henry Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.7 °C0.2 °C50.8 mm
February-6.8 °C2.7 °C47.75 mm
March-1.4 °C9.6 °C64.52 mm
April4.4 °C17.2 °C95.5 mm
May10.7 °C23.2 °C119.38 mm
June16.1 °C28.1 °C106.93 mm
July18.1 °C29.8 °C97.79 mm
August17 °C28.9 °C93.22 mm
September12.5 °C25.8 °C86.61 mm
October6.1 °C18.8 °C76.96 mm
November-0.1 °C10.2 °C65.53 mm
December-5.5 °C3.1 °C51.31 mm
Annual5.2 °C16.5 °C956.3 mm

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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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