Onawa Iowa Climate Data

Monthly Average Climate Data for Onawa Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.7 °C-0.8 °C17.02 mm
February-9.5 °C1.9 °C21.34 mm
March-3.4 °C9.4 °C41.66 mm
April2.7 °C16.9 °C89.66 mm
May9.6 °C22.9 °C116.84 mm
June15.6 °C28.3 °C116.59 mm
July17.7 °C30.1 °C96.52 mm
August16.2 °C28.8 °C102.62 mm
September11.1 °C25.6 °C78.49 mm
October3.9 °C18.5 °C57.15 mm
November-3.3 °C9.3 °C35.05 mm
December-9 °C1.7 °C28.19 mm
Annual3.3 °C16.1 °C801.13 mm

Climate Data for Onawa 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 ConditionsSevere Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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