Plymouth Iowa Climate Data

Monthly Average Climate Data for Plymouth Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-13.8 °C-4.5 °C24.38 mm
February-11.6 °C-1.9 °C27.94 mm
March-4.8 °C5 °C50.29 mm
April1.7 °C13.6 °C99.57 mm
May8.6 °C20.3 °C132.59 mm
June14.4 °C25.9 °C139.7 mm
July16.4 °C27.7 °C117.35 mm
August14.9 °C26.4 °C100.58 mm
September10.1 °C23 °C86.61 mm
October3.2 °C15.5 °C66.29 mm
November-3.7 °C6.3 °C44.2 mm
December-9.9 °C-1.3 °C33.78 mm
Annual2.1 °C13 °C923.28 mm

Climate Data for Plymouth Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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