Marion Iowa Climate Data

Monthly Average Climate Data for Marion Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.4 °C-2.1 °C29.97 mm
February-9.3 °C0.4 °C35.05 mm
March-3.1 °C7.8 °C54.36 mm
April3.1 °C16.1 °C98.81 mm
May9.6 °C22 °C121.41 mm
June15.3 °C27.1 °C143.51 mm
July17.2 °C28.8 °C116.08 mm
August15.8 °C27.8 °C112.78 mm
September11.1 °C24.4 °C100.58 mm
October4.4 °C17.2 °C75.44 mm
November-2.1 °C8.3 °C57.4 mm
December-7.9 °C1 °C42.93 mm
Annual3.6 °C14.9 °C988.32 mm

Climate Data for Marion 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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