| National Weather Service Forecast for:
Sun Prairie, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: 03/21/2026 1:35pm | ||||||||||||||||||||||||||||||||||||||||
| Sun Prairie WI | ||||||||||||||||||||||||||||||||||||||||
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| This Afternoon |
Mostly sunny, with a high near 71. Southwest wind around 15 mph, with gusts as high as 30 mph. |
| Tonight |
Mostly cloudy. Low around 40, with temperatures rising to around 46 overnight. Northwest wind 5 to 10 mph. |
| Sunday |
A slight chance of rain between 8am and 11am. Mostly cloudy, with a high near 43. North wind 10 to 15 mph. Chance of precipitation is 20%. |
| Sunday Night |
Partly cloudy, with a low around 26. North wind 5 to 10 mph. |
| Monday |
Sunny, with a high near 47. North wind 0 to 5 mph. |
| Monday Night |
Partly cloudy, with a low around 32. Southeast wind 0 to 5 mph. |
| Tuesday |
Mostly cloudy, with a high near 55. Southwest wind 5 to 10 mph. |
| Tuesday Night |
Mostly cloudy, with a low around 37. South wind around 5 mph. |
| Wednesday |
A slight chance of rain between 7am and 1pm. Mostly cloudy, with a high near 56. Chance of precipitation is 20%. |
| Wednesday Night |
Mostly cloudy, with a low around 43. |
| Thursday |
A slight chance of rain between 7am and 1pm. Partly sunny, with a high near 57. Chance of precipitation is 20%. |
| Thursday Night |
Mostly cloudy, with a low around 28. |
| Friday |
Partly sunny, with a high near 44. |
| Friday Night |
Partly cloudy, with a low around 27. |
Forecast from NOAA-NWS for Sun Prairie, WI.