Riverdale Iowa Climate Data

Monthly Average Climate Data for Riverdale Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.6 °F30.6 °F1.52 in.
February18.2 °F35.0 °F1.76 in.
March28.9 °F47.9 °F2.55 in.
April40.1 °F61.1 °F3.67 in.
May51.9 °F72.3 °F4.81 in.
June61.9 °F81.7 °F4.84 in.
July65.6 °F84.8 °F4.3 in.
August63.5 °F82.9 °F3.98 in.
September55.3 °F76.9 °F3.42 in.
October43.4 °F64.1 °F2.85 in.
November31.3 °F48.9 °F2.24 in.
December20.8 °F36.0 °F2.0 in.
Annual41.3 °F60.2 °F37.94 in.

Climate Data for Riverdale Iowa

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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