Grand Mound Iowa Climate Data

Monthly Average Climate Data for Grand Mound Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.9 °F29.3 °F1.32 in.
February16.6 °F33.7 °F1.59 in.
March27.5 °F46.7 °F2.42 in.
April38.6 °F60.4 °F3.83 in.
May50.5 °F71.6 °F4.75 in.
June60.6 °F80.8 °F4.89 in.
July64.0 °F83.8 °F4.32 in.
August61.8 °F81.9 °F4.49 in.
September53.4 °F76.2 °F3.86 in.
October41.6 °F63.2 °F3.0 in.
November29.7 °F48.0 °F2.18 in.
December19.3 °F34.8 °F1.81 in.
Annual39.7 °F59.2 °F38.46 in.

Climate Data for Grand Mound 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 : -15°F to -10°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