Oelwein Iowa Climate Data

Monthly Average Climate Data for Oelwein Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-13.2 °C-3.6 °C29.21 mm
February-10.9 °C-1.2 °C29.97 mm
March-4.3 °C6.2 °C48.01 mm
April2 °C14.3 °C92.46 mm
May8.8 °C20.9 °C115.06 mm
June14.7 °C26.3 °C142.75 mm
July16.4 °C27.8 °C128.27 mm
August15.1 °C26.7 °C105.66 mm
September10.3 °C23.4 °C93.98 mm
October3.4 °C16.2 °C69.09 mm
November-3.3 °C7.1 °C45.72 mm
December-9.4 °C-0.3 °C39.37 mm
Annual2.5 °C13.7 °C939.55 mm

Climate Data for Oelwein 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 ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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