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.

Mostly Cloudy

75°F

24°C

Humidity 84%
Wind Speed Calm
Barometer 29.93 in (1012.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 1 Sep 10:53 pm CDT
Extended Forecast for

Cottage Grove WI

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 89. Heat index values as high as 95. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 89 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 86. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the morning.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 72. Calm wind.
Wednesday
Partly sunny, with a high near 89. Heat index values as high as 95. Light and variable wind becoming west 5 to 10 mph in the morning.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Thursday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 86. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 50%.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the morning.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Sunday
A 40 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 63.
Labor Day
A 20 percent chance of showers. Partly sunny, with a high near 78.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 59.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cottage Grove WI
 43.09°N 89.19°W (Elev. 919 ft)
Last Update:
8:42 pm CDT Sep 1, 2026
Forecast Valid:
10pm CDT Sep 1, 2026-6pm CDT Sep 8, 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