Garnavillo Iowa Climate Data

Monthly Average Climate Data for Garnavillo Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.9 °C-3.6 °C31.5 mm
February-11 °C-0.9 °C31.24 mm
March-4.3 °C6.1 °C51.31 mm
April2.1 °C14 °C98.3 mm
May8.6 °C20.6 °C120.14 mm
June14.4 °C25.8 °C149.1 mm
July16.6 °C27.7 °C119.89 mm
August15.3 °C26.6 °C101.6 mm
September10.6 °C22.9 °C96.77 mm
October3.8 °C15.8 °C72.64 mm
November-2.9 °C6.8 °C53.59 mm
December-8.9 °C-0.4 °C40.64 mm
Annual2.6 °C13.5 °C966.72 mm

Climate Data for Garnavillo 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 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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