Sully Iowa Climate Data

Monthly Average Climate Data for Sully Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-1.5 °C26.42 mm
February-8.8 °C1.2 °C34.29 mm
March-2.8 °C8.4 °C53.34 mm
April3.4 °C15.9 °C100.33 mm
May10.4 °C21.8 °C126.24 mm
June16.1 °C27.2 °C136.14 mm
July18.1 °C29.2 °C108.97 mm
August16.6 °C28.1 °C111.51 mm
September11.7 °C24.6 °C91.44 mm
October4.9 °C17.4 °C69.6 mm
November-1.7 °C8.7 °C51.05 mm
December-7.6 °C1.6 °C37.59 mm
Annual4.1 °C15.2 °C946.92 mm

Climate Data for Sully Iowa

Average First Frost DateOct. 11 - Oct. 20
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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