National Weather Service Forecast for: Sun Prairie WI
Issued by: National Weather Service Milwaukee, WI
Updated: 2:24 pm CDT Jun 2, 2025
 
Tonight

Tonight: Partly cloudy, with a low around 66. South wind around 10 mph.
Partly Cloudy

 Tuesday

Tuesday: A slight chance of showers between noon and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Partly Sunny
then Chance
Showers and
Breezy
 Tuesday
Night
Tuesday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 57. Southwest wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Wednesday

Wednesday: A 40 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 73. North wind 5 to 10 mph.
Chance
Showers

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 54. East wind around 5 mph becoming calm in the evening.
Mostly Clear

 Thursday

Thursday: Increasing clouds, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.
Increasing
Clouds

 Thursday
Night
Thursday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.
Chance
Showers

 Friday

Friday: A 30 percent chance of showers. Mostly cloudy, with a high near 71. Northeast wind 5 to 10 mph.
Chance
Showers

 Friday
Night
Friday Night: Mostly clear, with a low around 52.
Mostly Clear
Lo 66 °F Hi 80 °F Lo 57 °F Hi 73 °F Lo 54 °F Hi 77 °F Lo 56 °F Hi 71 °F Lo 52 °F

Hazardous Weather Outlook
 

Tonight
 
 Partly cloudy, with a low around 66. South wind around 10 mph.
Tuesday
 
 A slight chance of showers between noon and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Tuesday Night
 
 Showers and possibly a thunderstorm before 4am, then showers likely. Low around 57. Southwest wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
 
 A 40 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 73. North wind 5 to 10 mph.
Wednesday Night
 
 Mostly clear, with a low around 54. East wind around 5 mph becoming calm in the evening.
Thursday
 
 Increasing clouds, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
 
 A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.
Friday
 
 A 30 percent chance of showers. Mostly cloudy, with a high near 71. Northeast wind 5 to 10 mph.
Friday Night
 
 Mostly clear, with a low around 52.
Saturday
 
 Sunny, with a high near 74.
Saturday Night
 
 A 20 percent chance of showers. Mostly clear, with a low around 54.
Sunday
 
 A 40 percent chance of showers. Mostly sunny, with a high near 77.
Sunday Night
 
 A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Monday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.

 

Forecast from NOAA-NWS for Sun Prairie WI.