National Weather Service Forecast for: Brookfield WI
Issued by: National Weather Service Milwaukee, WI
Updated: 11:17 pm CDT Jun 29, 2026
 
Tonight

Tonight: Mostly clear, with a low around 76. Southwest wind around 10 mph.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Hot

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 76. Southwest wind 10 to 15 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 103. Southwest wind 10 to 15 mph.
Hot

 Wednesday
Night
Wednesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.
Mostly Clear
then Slight
Chance
T-storms
 Thursday

Thursday: A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 93. West wind 10 to 15 mph. Chance of precipitation is 40%.
Mostly Sunny
then Chance
Showers
 Thursday
Night
Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Showers
Likely
 Friday

Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Showers
Likely
 Friday
Night
Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Showers
Likely
Lo 76 °F Hi 95 °F Lo 76 °F Hi 95 °F Lo 76 °F Hi 93 °F Lo 72 °F Hi 88 °F Lo 68 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Tonight
 
 Mostly clear, with a low around 76. Southwest wind around 10 mph.
Tuesday
 
 Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
 
 Mostly clear, with a low around 76. Southwest wind 10 to 15 mph.
Wednesday
 
 Sunny and hot, with a high near 95. Heat index values as high as 103. Southwest wind 10 to 15 mph.
Wednesday Night
 
 A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.
Thursday
 
 A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 93. West wind 10 to 15 mph. Chance of precipitation is 40%.
Thursday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Independence Day
 
 A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.
Saturday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Sunday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Monday
 
 A 20 percent chance of showers. Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Brookfield WI.