National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Madison, Dane County Regional-Truax Field (KMSN)

Lat: 43.14°NLon: 89.35°WElev: 860ft.

Partly Cloudy

43°F

6°C

Humidity 42%
Wind Speed S 8 mph
Barometer 30.32 in (1027.6 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 20 Apr 9:53 am CDT
Extended Forecast for

Sun Prairie WI

  • Today

    Today: Sunny, with a high near 54. South wind 5 to 10 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 42. South wind around 10 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 73. Southwest wind 5 to 10 mph.

    High: 73 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. East wind 5 to 10 mph becoming southeast in the afternoon.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. Southeast wind 5 to 10 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 78. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 78 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 58. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Showers

  • Friday

    Friday: A 40 percent chance of showers. Mostly cloudy, with a high near 68.

    High: 68 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 54. South wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 42. South wind around 10 mph.
Tuesday
Mostly sunny, with a high near 73. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 73. East wind 5 to 10 mph becoming southeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 54. Southeast wind 5 to 10 mph.
Thursday
Partly sunny, with a high near 78. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday Night
Showers and possibly a thunderstorm. Low around 58. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 68.
Friday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sun Prairie WI
 43.17°N 89.24°W (Elev. 965 ft)
Last Update:
8:26 am CDT Apr 20, 2026
Forecast Valid:
10am CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation