Wilton Iowa Climate Data

Monthly Average Climate Data for Wilton Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10 °C-1 °C34.8 mm
February-8.1 °C1.5 °C41.66 mm
March-2 °C8.7 °C60.96 mm
April4.2 °C16.2 °C93.47 mm
May10.8 °C22.3 °C122.17 mm
June16.3 °C27.4 °C130.3 mm
July18.2 °C29.2 °C108.2 mm
August16.9 °C28.2 °C103.38 mm
September12.3 °C24.9 °C91.19 mm
October5.7 °C17.7 °C74.17 mm
November-0.8 °C9.3 °C55.88 mm
December-6.7 °C1.9 °C46.74 mm
Annual4.7 °C15.5 °C962.92 mm

Climate Data for Wilton Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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