NWS Forecast for West Allis WI

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

Updated: 12:22 am CST Dec 23, 2025

Overnight Slight Chance Drizzle	Tuesday Partly Sunny	Tuesday Night Partly Cloudy	Wednesday Mostly Cloudy	Wednesday Night Chance Rain then Cloudy	Christmas Day Mostly Cloudy	Thursday Night Slight Chance Rain then Rain Likely	Friday Slight Chance Rain then Mostly Cloudy	Friday Night Cloudy
Lo 35 °F	Hi 43 °F	Lo 27 °F	Hi 41 °F	Lo 35 °F	Hi 41 °F	Lo 38 °F	Hi 45 °F	Lo 34 °F

Special Weather Statement

Overnight	A slight chance of drizzle before 1am. Mostly cloudy, with a low around 35. Southwest wind around 5 mph.
Tuesday	Partly sunny, with a high near 43. West wind 5 to 10 mph.
Tuesday Night	Partly cloudy, with a low around 27. Northwest wind around 5 mph becoming east after midnight.
Wednesday	Mostly cloudy, with a high near 41. East wind 5 to 10 mph becoming south in the afternoon.
Wednesday Night	A 40 percent chance of rain before midnight. Cloudy, with a low around 35. Calm wind becoming north around 5 mph after midnight.
Christmas Day	Mostly cloudy, with a high near 41. Northeast wind 5 to 10 mph.
Thursday Night	Rain likely, mainly after midnight. Cloudy, with a low around 38. Southeast wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday	A 20 percent chance of rain before noon. Cloudy, with a high near 45. Southeast wind around 5 mph becoming north in the afternoon.
Friday Night	Cloudy, with a low around 34.
Saturday	Mostly cloudy, with a high near 45.
Saturday Night	A 20 percent chance of rain. Mostly cloudy, with a low around 22.
Sunday	Partly sunny, with a high near 29. Breezy.
Sunday Night	Partly cloudy, with a low around 11.
Monday	Mostly sunny, with a high near 24.

Forecast from NOAA-NWS for West Allis WI.