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Climate & Weather Averages in West Allis, Wisconsin, USA

Currently: 65 °F. Overcast. (Weather station: General Mitchell International Airport, USA). See more current weather

Annual Weather Averages Near West Allis

Averages are for General Mitchell International Airport, which is 7 miles from West Allis.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in West Allis

High Temp: 81 °F

Low Temp: 17 °F

Mean Temp: 49 °F

Precipitation: 2.86"

Humidity: 69%

Dew Point: 39 °F

Wind: 16 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

January Climate & Weather Averages in West Allis

High Temp: 30 °F

Low Temp: 17 °F

Mean Temp: 24 °F

Precipitation: 1.79"

Humidity: 73%

Dew Point: 17 °F

Wind: 18 mph

Pressure: 30.10 "Hg

Visibility: 8 mi

February Climate & Weather Averages in West Allis

High Temp: 33 °F

Low Temp: 20 °F

Mean Temp: 26 °F

Precipitation: 1.73"

Humidity: 70%

Dew Point: 18 °F

Wind: 18 mph

Pressure: 30.10 "Hg

Visibility: 8 mi

March Climate & Weather Averages in West Allis

High Temp: 43 °F

Low Temp: 28 °F

Mean Temp: 36 °F

Precipitation: 2.10"

Humidity: 67%

Dew Point: 26 °F

Wind: 17 mph

Pressure: 30.10 "Hg

Visibility: 8 mi

April Climate & Weather Averages in West Allis

High Temp: 53 °F

Low Temp: 37 °F

Mean Temp: 45 °F

Precipitation: 3.82"

Humidity: 65%

Dew Point: 33 °F

Wind: 18 mph

Pressure: 29.99 "Hg

Visibility: 9 mi

May Climate & Weather Averages in West Allis

High Temp: 65 °F

Low Temp: 47 °F

Mean Temp: 56 °F

Precipitation: 3.50"

Humidity: 66%

Dew Point: 44 °F

Wind: 16 mph

Pressure: 29.99 "Hg

Visibility: 9 mi

June Climate & Weather Averages in West Allis

High Temp: 76 °F

Low Temp: 58 °F

Mean Temp: 67 °F

Precipitation: 4.39"

Humidity: 68%

Dew Point: 56 °F

Wind: 14 mph

Pressure: 29.94 "Hg

Visibility: 9 mi

July Climate & Weather Averages in West Allis

High Temp: 81 °F

Low Temp: 64 °F

Mean Temp: 73 °F

Precipitation: 3.33"

Humidity: 69%

Dew Point: 61 °F

Wind: 13 mph

Pressure: 29.97 "Hg

Visibility: 9 mi

August Climate & Weather Averages in West Allis

High Temp: 80 °F

Low Temp: 64 °F

Mean Temp: 72 °F

Precipitation: 3.75"

Humidity: 71%

Dew Point: 62 °F

Wind: 12 mph

Pressure: 30.00 "Hg

Visibility: 9 mi

September Climate & Weather Averages in West Allis

High Temp: 73 °F

Low Temp: 56 °F

Mean Temp: 64 °F

Precipitation: 3.10"

Humidity: 71%

Dew Point: 54 °F

Wind: 14 mph

Pressure: 30.03 "Hg

Visibility: 9 mi

October Climate & Weather Averages in West Allis

High Temp: 60 °F

Low Temp: 44 °F

Mean Temp: 52 °F

Precipitation: 2.69"

Humidity: 68%

Dew Point: 42 °F

Wind: 16 mph

Pressure: 30.04 "Hg

Visibility: 9 mi

November Climate & Weather Averages in West Allis

High Temp: 47 °F

Low Temp: 33 °F

Mean Temp: 40 °F

Precipitation: 2.17"

Humidity: 69%

Dew Point: 30 °F

Wind: 17 mph

Pressure: 30.08 "Hg

Visibility: 9 mi

December Climate & Weather Averages in West Allis

High Temp: 35 °F

Low Temp: 23 °F

Mean Temp: 29 °F

Precipitation: 1.93"

Humidity: 74%

Dew Point: 22 °F

Wind: 17 mph

Pressure: 30.07 "Hg

Visibility: 8 mi

Quick Climate Info

Hottest MonthJuly (73 °F avg)
Coldest MonthJanuary (24 °F avg)
Wettest MonthJune (4.39" avg)
Windiest MonthApril (18 mph avg)
Annual precip.34.30" (per year)

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