West Allis Wisconsin Climate Data

Monthly Average Climate Data for West Allis Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.9 °F29.4 °F1.75 in.
February16.8 °F33.0 °F1.69 in.
March25.8 °F43.5 °F2.0 in.
April36.1 °F55.4 °F3.97 in.
May47.0 °F67.3 °F4.03 in.
June57.1 °F77.3 °F4.84 in.
July62.6 °F82.2 °F3.61 in.
August61.3 °F80.9 °F3.72 in.
September53.1 °F73.9 °F3.24 in.
October41.6 °F61.1 °F2.82 in.
November30.3 °F46.8 °F2.14 in.
December20.2 °F34.7 °F2.04 in.
Annual38.8 °F57.1 °F35.85 in.

Climate Data for West Allis Wisconsin

Average First Frost DateOct. 11 - Oct. 20
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 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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