National Weather Service Forecast for: West Allis WI
Issued by: National Weather Service Milwaukee, WI
Updated: 12:36 am CST Dec 5, 2025
 
Overnight

Overnight: Mostly cloudy, with a low around 5. Wind chill values between -5 and zero. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Mostly Cloudy

 Friday

Friday: A slight chance of snow and freezing rain after 5pm. Mostly cloudy, with a high near 26. Wind chill values between -5 and 5. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Partly Sunny
then Slight
Chance Wintry
Mix
 Friday
Night
Friday Night: A chance of snow and freezing rain before midnight. Mostly cloudy, with a low around 20. Southwest wind around 10 mph becoming west after midnight. Chance of precipitation is 50%.
Chance Wintry
Mix then
Mostly Cloudy
 Saturday

Saturday: Partly sunny, with a high near 26. Northwest wind 5 to 10 mph.
Partly Sunny

 Saturday
Night
Saturday Night: A 50 percent chance of snow after midnight. Mostly cloudy, with a low around 14. Calm wind becoming north around 5 mph after midnight.
Mostly Cloudy
then Chance
Snow
 Sunday

Sunday: A 30 percent chance of snow before noon. Partly sunny, with a high near 23. North wind 5 to 10 mph.
Chance Snow
then Mostly
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 6. North wind 5 to 10 mph becoming light northwest after midnight.
Partly Cloudy

 Monday

Monday: A 20 percent chance of snow after noon. Partly sunny, with a high near 23. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Partly Sunny
then Slight
Chance Snow
 Monday
Night
Monday Night: Snow. Low around 15. Chance of precipitation is 80%.
Snow
Lo 5 °F Hi 26 °F Lo 20 °F Hi 26 °F Lo 14 °F Hi 23 °F Lo 6 °F Hi 23 °F Lo 15 °F

Hazardous Weather Outlook
 

Overnight
 
 Mostly cloudy, with a low around 5. Wind chill values between -5 and zero. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Friday
 
 A slight chance of snow and freezing rain after 5pm. Mostly cloudy, with a high near 26. Wind chill values between -5 and 5. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday Night
 
 A chance of snow and freezing rain before midnight. Mostly cloudy, with a low around 20. Southwest wind around 10 mph becoming west after midnight. Chance of precipitation is 50%.
Saturday
 
 Partly sunny, with a high near 26. Northwest wind 5 to 10 mph.
Saturday Night
 
 A 50 percent chance of snow after midnight. Mostly cloudy, with a low around 14. Calm wind becoming north around 5 mph after midnight.
Sunday
 
 A 30 percent chance of snow before noon. Partly sunny, with a high near 23. North wind 5 to 10 mph.
Sunday Night
 
 Partly cloudy, with a low around 6. North wind 5 to 10 mph becoming light northwest after midnight.
Monday
 
 A 20 percent chance of snow after noon. Partly sunny, with a high near 23. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Monday Night
 
 Snow. Low around 15. Chance of precipitation is 80%.
Tuesday
 
 A 30 percent chance of snow before noon. Mostly cloudy, with a high near 32.
Tuesday Night
 
 Snow likely. Mostly cloudy, with a low around 20. Chance of precipitation is 60%.
Wednesday
 
 Snow likely. Mostly cloudy, with a high near 32. Chance of precipitation is 60%.
Wednesday Night
 
 A 30 percent chance of snow. Mostly cloudy, with a low around 12.
Thursday
 
 A 30 percent chance of snow. Partly sunny, with a high near 23.

 

Forecast from NOAA-NWS for West Allis WI.