Shelby Iowa Climate Data

Monthly Average Climate Data for Shelby Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.6 °F29.9 °F0.79 in.
February15.8 °F34.7 °F1.03 in.
March26.6 °F48.0 °F1.86 in.
April37.5 °F60.9 °F3.51 in.
May49.9 °F71.3 °F5.11 in.
June60.3 °F81.0 °F5.07 in.
July64.0 °F84.3 °F3.84 in.
August61.2 °F82.2 °F4.08 in.
September52.0 °F76.4 °F3.35 in.
October40.1 °F63.9 °F2.65 in.
November27.4 °F47.6 °F1.5 in.
December17.7 °F35.0 °F1.3 in.
Annual38.7 °F59.6 °F34.09 in.

Climate Data for Shelby 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 : -15°F to -10°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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