Ralston Iowa Climate Data

Monthly Average Climate Data for Ralston Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.1 °F28.2 °F0.84 in.
February14.2 °F32.9 °F1.11 in.
March25.5 °F46.2 °F1.97 in.
April36.4 °F60.4 °F3.61 in.
May49.0 °F71.3 °F4.93 in.
June59.6 °F81.1 °F5.06 in.
July63.2 °F84.2 °F4.06 in.
August60.5 °F82.0 °F4.03 in.
September51.3 °F76.4 °F3.14 in.
October39.1 °F63.4 °F2.64 in.
November26.6 °F46.7 °F1.57 in.
December16.1 °F33.5 °F1.29 in.
Annual37.6 °F58.9 °F34.25 in.

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 : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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