National Weather Service Forecast for: Waukesha WI
Issued by: National Weather Service Milwaukee, WI
Updated: 5:55 pm CDT Jun 11, 2025
 
Tonight

Tonight: A chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 60. Northwest wind around 5 mph becoming northeast after midnight. Chance of precipitation is 50%.
Chance
T-storms

 Thursday

Thursday: Partly sunny, with a high near 73. East wind 5 to 10 mph.
Partly Sunny

 Thursday
Night
Thursday Night: A 20 percent chance of showers after 4am. Areas of smoke before 7pm. Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph.
Areas Smoke
then Slight
Chance
Showers
 Friday

Friday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 77. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 40%.
Chance
Showers

 Friday
Night
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. East wind 5 to 10 mph. Chance of precipitation is 40%.
Chance
T-storms

 Saturday

Saturday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 70. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Chance
Showers

 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 54. North wind 5 to 10 mph.
Mostly Cloudy

 Sunday

Sunday: Partly sunny, with a high near 73. Northeast wind 5 to 10 mph.
Partly Sunny

 Sunday
Night
Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55.
Partly Cloudy
then Slight
Chance
Showers
Lo 60 °F Hi 73 °F Lo 56 °F Hi 77 °F Lo 57 °F Hi 70 °F Lo 54 °F Hi 73 °F Lo 55 °F

Hazardous Weather Outlook
Air Quality Alert
 

Tonight
 
 A chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 60. Northwest wind around 5 mph becoming northeast after midnight. Chance of precipitation is 50%.
Thursday
 
 Partly sunny, with a high near 73. East wind 5 to 10 mph.
Thursday Night
 
 A 20 percent chance of showers after 4am. Areas of smoke before 7pm. Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph.
Friday
 
 A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 77. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 40%.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. East wind 5 to 10 mph. Chance of precipitation is 40%.
Saturday
 
 A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 70. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday Night
 
 Mostly cloudy, with a low around 54. North wind 5 to 10 mph.
Sunday
 
 Partly sunny, with a high near 73. Northeast wind 5 to 10 mph.
Sunday Night
 
 A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55.
Monday
 
 A 20 percent chance of showers. Mostly sunny, with a high near 79.
Monday Night
 
 A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Tuesday
 
 A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Wednesday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Waukesha WI.