NWS Forecast for West Allis WI

National Weather Service Forecast for: West Allis WI
Issued by: National Weather Service Milwaukee, WI

Updated: 5:13 am CST Feb 2, 2026

Overnight Chance Wintry Mix	Monday Slight Chance Wintry Mix then Partly Sunny	Monday Night Mostly Cloudy	Tuesday Sunny	Tuesday Night Partly Cloudy	Wednesday Sunny	Wednesday Night Partly Cloudy	Thursday Partly Sunny	Thursday Night Chance Snow
Lo 20 °F	Hi 26 °F	Lo 12 °F	Hi 22 °F	Lo 7 °F	Hi 25 °F	Lo 11 °F	Hi 31 °F	Lo 28 °F

Hazardous Weather Outlook

Overnight	A chance of snow and freezing rain. Cloudy, with a low around 20. West wind around 5 mph. Chance of precipitation is 30%.
Monday	A slight chance of snow showers and freezing rain before 7am, then a chance of flurries between 7am and noon. Mostly cloudy, with a high near 26. West wind 5 to 10 mph. Chance of precipitation is 20%.
Monday Night	Mostly cloudy, with a low around 12. West wind around 5 mph.
Tuesday	Sunny, with a high near 22. North wind around 5 mph.
Tuesday Night	Partly cloudy, with a low around 7. North wind around 5 mph becoming calm in the evening.
Wednesday	Sunny, with a high near 25. Northwest wind around 5 mph.
Wednesday Night	Partly cloudy, with a low around 11. West wind around 5 mph.
Thursday	Partly sunny, with a high near 31. Southwest wind 5 to 15 mph.
Thursday Night	A 40 percent chance of snow. Mostly cloudy, with a low around 28.
Friday	A 20 percent chance of snow before noon. Partly sunny, with a high near 33.
Friday Night	Partly cloudy, with a low around 7.
Saturday	Mostly sunny, with a high near 21.
Saturday Night	A 20 percent chance of snow. Mostly cloudy, with a low around 14.
Sunday	Partly sunny, with a high near 27.

Forecast from NOAA-NWS for West Allis WI.