Griswold Iowa Climate Data

Monthly Average Climate Data for Griswold Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-0.4 °C21.08 mm
February-8.7 °C2.3 °C27.94 mm
March-2.5 °C9.7 °C48.51 mm
April3.3 °C16.8 °C88.9 mm
May10.2 °C22.5 °C138.68 mm
June16.1 °C27.8 °C130.05 mm
July18.2 °C29.7 °C99.06 mm
August16.7 °C28.8 °C99.82 mm
September11.3 °C25.3 °C85.85 mm
October4.6 °C18.3 °C72.39 mm
November-2.4 °C9.4 °C43.18 mm
December-7.9 °C2.3 °C33.27 mm
Annual4 °C16 °C888.73 mm

Climate Data for Griswold 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
2024 plantmaps.com