Granville Iowa Climate Data

Monthly Average Climate Data for Granville Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January7.5 °F25.8 °F0.73 in.
February11.8 °F30.5 °F0.86 in.
March23.3 °F43.5 °F1.71 in.
April34.6 °F58.1 °F3.17 in.
May47.6 °F70.2 °F4.05 in.
June58.5 °F80.1 °F4.48 in.
July62.1 °F83.3 °F3.45 in.
August59.6 °F81.0 °F3.6 in.
September50.5 °F74.8 °F3.17 in.
October37.7 °F61.4 °F2.33 in.
November24.4 °F44.6 °F1.38 in.
December13.4 °F30.8 °F0.95 in.
Annual35.9 °F57 °F29.88 in.

Climate Data for Granville Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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