Lewis Iowa Climate Data

Monthly Average Climate Data for Lewis Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.8 °F30.8 °F0.84 in.
February15.8 °F35.8 °F1.13 in.
March26.9 °F49.0 °F1.91 in.
April37.4 °F61.9 °F3.55 in.
May50.0 °F72.1 °F5.41 in.
June60.4 °F81.8 °F4.9 in.
July64.1 °F85.1 °F3.92 in.
August61.3 °F83.4 °F3.98 in.
September51.8 °F77.2 °F3.39 in.
October39.7 °F64.5 °F2.84 in.
November27.1 °F48.5 °F1.68 in.
December17.2 °F35.7 °F1.33 in.
Annual38.6 °F60.5 °F34.88 in.

Climate Data for Lewis Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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