Garnavillo Iowa Climate Data

Monthly Average Climate Data for Garnavillo Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.7 °F25.6 °F1.24 in.
February12.2 °F30.3 °F1.23 in.
March24.3 °F43.0 °F2.02 in.
April35.8 °F57.2 °F3.87 in.
May47.5 °F69.0 °F4.73 in.
June58.0 °F78.5 °F5.87 in.
July61.8 °F81.8 °F4.72 in.
August59.5 °F79.9 °F4.0 in.
September51.1 °F73.3 °F3.81 in.
October38.9 °F60.4 °F2.86 in.
November26.8 °F44.2 °F2.11 in.
December15.9 °F31.3 °F1.6 in.
Annual36.7 °F56.2 °F38.06 in.

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 : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation