| National Weather Service Forecast for:
Sun Prairie, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: 08/14/2026 8:47pm | ||||||||||||||||||||||||||||||||||||||||
| Sun Prairie WI | ||||||||||||||||||||||||||||||||||||||||
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| Tonight |
A chance of rain showers before 3am, then a chance of showers and thunderstorms. Cloudy, with a low around 63. East wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible. |
| Saturday |
A chance of showers and thunderstorms before 10am. Cloudy, with a high near 82. Southeast wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Saturday Night |
A chance of rain showers between 10pm and 4am, then a slight chance of showers and thunderstorms between 4am and 5am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Sunday |
Mostly sunny, with a high near 82. Northwest wind 5 to 10 mph. New rainfall amounts between a tenth and quarter of an inch possible. |
| Sunday Night |
Mostly clear, with a low around 59. Northwest wind 0 to 5 mph. |
| Monday |
Sunny, with a high near 79. Northwest wind 0 to 5 mph. |
| Monday Night |
Mostly clear, with a low around 60. West wind 0 to 5 mph. |
| Tuesday |
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Tuesday Night |
Showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 80%. |
| Wednesday |
Showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 80%. |
| Wednesday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 57. Chance of precipitation is 20%. |
| Thursday |
Mostly sunny, with a high near 75. |
| Thursday Night |
Partly cloudy, with a low around 57. |
| Friday |
A slight chance of rain showers after 7am. Mostly sunny, with a high near 76. Chance of precipitation is 20%. |
Forecast from NOAA-NWS for Sun Prairie, WI.