Spencer Iowa Climate Data

Monthly Average Climate Data for Spencer Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-13.7 °C-3.9 °C17.53 mm
February-11.5 °C-1.6 °C20.32 mm
March-4.8 °C5.6 °C40.13 mm
April1.7 °C14.2 °C86.36 mm
May8.8 °C20.8 °C107.95 mm
June14.8 °C26.6 °C117.09 mm
July16.7 °C28.7 °C94.23 mm
August15.2 °C27.3 °C93.98 mm
September10.3 °C23.9 °C80.77 mm
October3 °C16.1 °C59.69 mm
November-4.2 °C6.9 °C36.07 mm
December-10.3 °C-0.9 °C23.37 mm
Annual2.2 °C13.6 °C777.49 mm

Climate Data for Spencer Iowa

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 11 - May 20
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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