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

Hazardous Weather Conditions

Current conditions at

Madison, Dane County Regional-Truax Field (KMSN)

Lat: 43.14°NLon: 89.35°WElev: 860ft.

Overcast

67°F

19°C

Humidity 84%
Wind Speed Calm
Barometer 30.00 in (1015.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 Sep 10:53 pm CDT
Extended Forecast for

Sun Prairie WI

  • Tonight

    Tonight: A slight chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. Calm wind becoming south around 5 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Southeast wind around 5 mph becoming west in the afternoon. Chance of precipitation is 20%.

    High: 75 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms and
    Patchy Fog

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 4pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Calm wind. Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 74 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 57. Northeast wind around 5 mph.

    Low: 57 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 72. Northeast wind 5 to 10 mph.

    High: 72 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 61. Calm wind becoming south around 5 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers, with thunderstorms also possible after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Southeast wind around 5 mph becoming west in the afternoon. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 59. Calm wind.
Monday
A chance of showers, with thunderstorms also possible after 4pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Calm wind. Chance of precipitation is 40%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 57. Northeast wind around 5 mph.
Wednesday
Mostly cloudy, with a high near 72. Northeast wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 54.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 52.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sun Prairie WI
 43.17°N 89.24°W (Elev. 965 ft)
Last Update:
10:54 pm CDT Sep 20, 2025
Forecast Valid:
11pm CDT Sep 20, 2025-6pm CDT Sep 27, 2025
 
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