| National Weather Service Forecast for:
Sun Prairie, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: 05/22/2026 1:35pm | ||||||||||||||||||||||||||||||||||||||||
| Sun Prairie WI | ||||||||||||||||||||||||||||||||||||||||
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| This Afternoon |
Mostly cloudy, with a high near 65. East wind 10 to 15 mph. |
| Tonight |
Cloudy, with a low around 52. East wind 5 to 15 mph. |
| Saturday |
A chance of rain showers after 3pm. Partly sunny, with a high near 72. Southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible. |
| Saturday Night |
A chance of rain showers. Mostly cloudy, with a low around 53. Southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible. |
| Sunday |
A slight chance of rain showers before 7am. Mostly sunny, with a high near 77. West wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
| Sunday Night |
Mostly clear, with a low around 53. Southwest wind 0 to 5 mph. |
| Memorial Day |
Sunny, with a high near 84. Southwest wind 0 to 5 mph. |
| Monday Night |
Mostly clear, with a low around 57. South wind 0 to 5 mph. |
| Tuesday |
Sunny, with a high near 87. |
| Tuesday Night |
Partly cloudy, with a low around 58. |
| Wednesday |
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%. |
| Wednesday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 56. Chance of precipitation is 20%. |
| Thursday |
Mostly sunny, with a high near 80. |
| Thursday Night |
Partly cloudy, with a low around 55. |
Forecast from NOAA-NWS for Sun Prairie, WI.