Shelby Iowa Climate Data

Monthly Average Climate Data for Shelby Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.3 °C-1.2 °C20.07 mm
February-9 °C1.5 °C26.16 mm
March-3 °C8.9 °C47.24 mm
April3.1 °C16.1 °C89.15 mm
May9.9 °C21.8 °C129.79 mm
June15.7 °C27.2 °C128.78 mm
July17.8 °C29.1 °C97.54 mm
August16.2 °C27.9 °C103.63 mm
September11.1 °C24.7 °C85.09 mm
October4.5 °C17.7 °C67.31 mm
November-2.6 °C8.7 °C38.1 mm
December-7.9 °C1.7 °C33.02 mm
Annual3.7 °C15.3 °C865.88 mm

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 : -26.1°C to -23.3°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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