| National Weather Service Forecast for:
Sun Prairie, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: 09/23/2026 3:01pm | ||||||||||||||||||||||||||||||||||||||||
| Sun Prairie WI | ||||||||||||||||||||||||||||||||||||||||
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| This Afternoon |
Partly sunny, with a high near 66. East wind 5 to 10 mph. |
| Tonight |
Partly cloudy, with a low around 50. Northeast wind around 5 mph. |
| Thursday |
Mostly sunny, with a high near 67. East wind 5 to 10 mph. |
| Thursday Night |
Mostly cloudy, with a low around 53. East wind 0 to 5 mph. |
| Friday |
Partly sunny, with a high near 68. East wind 0 to 5 mph. |
| Friday Night |
Partly cloudy, with a low around 47. East wind 0 to 5 mph. |
| Saturday |
Partly sunny, with a high near 66. Southeast wind 0 to 10 mph. |
| Saturday Night |
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 50. Southeast wind 0 to 5 mph. Chance of precipitation is 20%. |
| Sunday |
A slight chance of rain showers before 7am. Mostly cloudy, with a high near 66. Chance of precipitation is 20%. |
| Sunday Night |
Mostly cloudy, with a low around 49. |
| Monday |
Mostly sunny, with a high near 69. |
| Monday Night |
Partly cloudy, with a low around 53. |
| Tuesday |
A chance of rain showers after 7am. Partly sunny, with a high near 70. Chance of precipitation is 50%. |
| Tuesday Night |
Rain showers likely before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%. |
Forecast from NOAA-NWS for Sun Prairie, WI.