Chelsea Iowa Climate Data

Monthly Average Climate Data for Chelsea Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.3 °C-2.3 °C28.19 mm
February-10.2 °C0.4 °C30.99 mm
March-3.6 °C7.8 °C53.09 mm
April2.7 °C15.7 °C93.47 mm
May9.4 °C21.8 °C119.38 mm
June15.2 °C26.9 °C134.11 mm
July17.1 °C28.9 °C101.6 mm
August15.4 °C27.9 °C102.87 mm
September10.6 °C24.5 °C91.19 mm
October3.8 °C17.2 °C70.36 mm
November-2.8 °C8.5 °C52.07 mm
December-8.4 °C1 °C38.61 mm
Annual3.1 °C14.9 °C915.93 mm

Climate Data for Chelsea 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 5a : -28.9°C to -26.1°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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