River Sioux Iowa Climate Data

Monthly Average Climate Data for River Sioux Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.6 °C-0.7 °C19.3 mm
February-9.4 °C1.9 °C24.89 mm
March-3.2 °C9.4 °C50.04 mm
April2.8 °C16.8 °C92.71 mm
May9.8 °C22.7 °C117.86 mm
June15.8 °C28.3 °C130.05 mm
July17.8 °C30.2 °C96.27 mm
August16.2 °C28.9 °C107.44 mm
September11.1 °C25.6 °C96.52 mm
October3.9 °C18.2 °C63.25 mm
November-3.2 °C9.6 °C40.13 mm
December-8.8 °C1.8 °C33.27 mm
Annual3.4 °C16.1 °C871.73 mm

Climate Data for River Sioux Iowa

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