Henderson Iowa Climate Data

Monthly Average Climate Data for Henderson Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.6 °C0.1 °C20.07 mm
February-8.4 °C2.8 °C24.38 mm
March-2.3 °C10.2 °C45.97 mm
April3.7 °C17.2 °C85.85 mm
May10.6 °C22.9 °C138.43 mm
June16.6 °C28.2 °C132.59 mm
July18.7 °C30.1 °C100.08 mm
August17.2 °C29.2 °C98.3 mm
September11.8 °C25.7 °C87.63 mm
October4.9 °C18.6 °C72.9 mm
November-2.1 °C9.8 °C40.64 mm
December-7.6 °C2.7 °C33.02 mm
Annual4.4 °C16.5 °C879.86 mm

Climate Data for Henderson Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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