National Weather Service Forecast for: West Allis WI
Issued by: National Weather Service Milwaukee, WI
Updated: 2:41 pm CDT Jul 16, 2026
 
Tonight

Tonight: Areas of smoke. Mostly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.
Areas Smoke

 Friday

Friday: Isolated showers and thunderstorms after 1pm. Widespread smoke, mainly before 9am. Mostly sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 20%.
Smoke then
Isolated
T-storms
 Friday
Night
Friday Night: Scattered showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Scattered
T-storms then
Mostly Clear
 Saturday

Saturday: Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly sunny, with a high near 88. West wind around 10 mph becoming north in the afternoon. Chance of precipitation is 30%.
Scattered
Showers

 Saturday
Night
Saturday Night: Mostly clear, with a low around 64. Northeast wind 5 to 10 mph becoming light after midnight.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 83. Light and variable wind becoming east 5 to 10 mph in the morning.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 65. Southeast wind around 5 mph becoming calm.
Partly Cloudy

 Monday

Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Southwest wind 5 to 15 mph. Chance of precipitation is 40%.
Slight Chance
Showers then
Chance
T-storms
 Monday
Night
Monday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
Chance
T-storms
Lo 69 °F Hi 90 °F Lo 73 °F Hi 88 °F Lo 64 °F Hi 83 °F Lo 65 °F Hi 89 °F Lo 68 °F

Hazardous Weather Outlook
Air Quality Alert
 

Tonight
 
 Areas of smoke. Mostly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.
Friday
 
 Isolated showers and thunderstorms after 1pm. Widespread smoke, mainly before 9am. Mostly sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 20%.
Friday Night
 
 Scattered showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday
 
 Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly sunny, with a high near 88. West wind around 10 mph becoming north in the afternoon. Chance of precipitation is 30%.
Saturday Night
 
 Mostly clear, with a low around 64. Northeast wind 5 to 10 mph becoming light after midnight.
Sunday
 
 Sunny, with a high near 83. Light and variable wind becoming east 5 to 10 mph in the morning.
Sunday Night
 
 Partly cloudy, with a low around 65. Southeast wind around 5 mph becoming calm.
Monday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Southwest wind 5 to 15 mph. Chance of precipitation is 40%.
Monday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
Tuesday
 
 A 20 percent chance of showers after 1pm. Sunny, with a high near 84.
Tuesday Night
 
 Mostly clear, with a low around 61.
Wednesday
 
 Sunny, with a high near 79.
Wednesday Night
 
 Mostly clear, with a low around 60.
Thursday
 
 Sunny, with a high near 82.

 

Forecast from NOAA-NWS for West Allis WI.