Oelwein Iowa Climate Data

Monthly Average Climate Data for Oelwein Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.3 °F25.6 °F1.15 in.
February12.3 °F29.8 °F1.18 in.
March24.2 °F43.1 °F1.89 in.
April35.6 °F57.8 °F3.64 in.
May47.8 °F69.6 °F4.53 in.
June58.5 °F79.3 °F5.62 in.
July61.6 °F82.1 °F5.05 in.
August59.1 °F80.1 °F4.16 in.
September50.5 °F74.2 °F3.7 in.
October38.1 °F61.1 °F2.72 in.
November26.0 °F44.7 °F1.8 in.
December15.1 °F31.4 °F1.55 in.
Annual36.4 °F56.6 °F36.99 in.

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 : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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