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.

Fair

72°F

22°C

Humidity 94%
Wind Speed Calm
Barometer 29.93 in (1012.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 2 Sep 12:53 am CDT
Extended Forecast for

Cottage Grove WI

  • Overnight

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

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 90 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 70. West wind around 5 mph becoming calm.

    Low: 70 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 87. Calm wind becoming east around 5 mph in the afternoon.

    High: 87 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. East wind around 5 mph becoming south in the afternoon.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

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

    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

Overnight
Partly cloudy, with a low around 72. Calm wind.
Wednesday
A slight chance of showers before 3pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 70. West wind around 5 mph becoming calm.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 87. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. East wind around 5 mph becoming south in the afternoon.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.
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:
11:41 pm CDT Sep 1, 2026
Forecast Valid:
1am CDT Sep 2, 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