Waterloo Iowa Climate Data

Monthly Average Climate Data for Waterloo Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.5 °C-3.1 °C28.45 mm
February-10.2 °C-0.6 °C30.73 mm
March-3.8 °C6.8 °C53.09 mm
April2.7 °C14.9 °C104.14 mm
May9.6 °C21.4 °C123.19 mm
June15.6 °C26.8 °C145.29 mm
July17.2 °C28.5 °C122.17 mm
August15.7 °C27.4 °C107.7 mm
September10.8 °C24.1 °C92.46 mm
October4 °C16.6 °C75.95 mm
November-2.8 °C7.6 °C51.31 mm
December-8.7 °C0.3 °C39.88 mm
Annual3.1 °C14.2 °C974.36 mm

Climate Data for Waterloo 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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