National Weather Service Forecast for: Sun Prairie, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: 07/03/2026 11:52am

Sun Prairie WI
 
This
Afternoon
This Afternoon: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Independence
Day
Independence Day: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday

Sunday: Chance Rain Showers
Chance Rain Showers
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Hi 87 °F Hi 83 °F Hi 80 °F Hi 81 °F Hi 85 °F Hi 86 °F Hi 85 °F  
 
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Showers And Thunderstorms
Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 68 °F Lo 64 °F Lo 61 °F Lo 61 °F Lo 64 °F Lo 65 °F Lo 65 °F  

 

This Afternoon
 
A chance of showers and thunderstorms. Partly sunny. High near 87, with temperatures falling to around 82 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tonight
 
A chance of showers and thunderstorms before 1am, then patchy fog and a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Independence Day
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 83. Southwest wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
Showers and thunderstorms before 9pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. North wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
A chance of rain showers. Partly sunny, with a high near 80. Northwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 61. Northwest wind 5 to 10 mph. Chance of precipitation is 30%.
Monday
 
Mostly sunny, with a high near 81. North wind around 5 mph.
Monday Night
 
Partly cloudy, with a low around 61. North wind 0 to 5 mph.
Tuesday
 
Mostly sunny, with a high near 85.
Tuesday Night
 
Mostly clear, with a low around 64.
Wednesday
 
Mostly sunny, with a high near 86.
Wednesday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Thursday Night
 
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Sun Prairie, WI.