Princeton Iowa Climate Data

Monthly Average Climate Data for Princeton Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.1 °C-1.1 °C39.12 mm
February-8.1 °C1.4 °C44.96 mm
March-2.1 °C8.6 °C63.5 mm
April4.1 °C16.1 °C95 mm
May10.7 °C22.3 °C120.9 mm
June16.3 °C27.5 °C126.49 mm
July18.3 °C29.2 °C113.03 mm
August17.1 °C28.1 °C103.63 mm
September12.4 °C24.8 °C90.68 mm
October5.9 °C17.6 °C72.14 mm
November-0.8 °C9.2 °C57.66 mm
December-6.6 °C1.9 °C52.32 mm
Annual4.8 °C15.5 °C979.43 mm

Climate Data for Princeton 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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