Ralston Iowa Climate Data

Monthly Average Climate Data for Ralston Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.2 °C-2.1 °C21.34 mm
February-9.9 °C0.5 °C28.19 mm
March-3.6 °C7.9 °C50.04 mm
April2.4 °C15.8 °C91.69 mm
May9.4 °C21.8 °C125.22 mm
June15.3 °C27.3 °C128.52 mm
July17.3 °C29 °C103.12 mm
August15.8 °C27.8 °C102.36 mm
September10.7 °C24.7 °C79.76 mm
October3.9 °C17.4 °C67.06 mm
November-3 °C8.2 °C39.88 mm
December-8.8 °C0.8 °C32.77 mm
Annual3.1 °C14.9 °C869.95 mm

Climate Data for Ralston Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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