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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

Madison, Dane County Regional-Truax Field (KMSN)

Lat: 43.14°NLon: 89.35°WElev: 860ft.

Overcast

62°F

17°C

Humidity 96%
Wind Speed NE 10 mph
Barometer 30.22 in (1023.4 mb)
Dewpoint 61°F (16°C)
Visibility 8.00 mi
Last update 17 Sep 9:53 am CDT
Extended Forecast for

Sun Prairie WI

  • Today

    Today: A chance of showers or sprinkles before 1pm, then a chance of sprinkles between 1pm and 3pm. Cloudy, with a high near 70. Northeast wind around 5 mph. Chance of precipitation is 30%.

    High: 70 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. Northeast wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 68. East wind 5 to 15 mph.

    High: 68 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, then showers and possibly a thunderstorm after 10pm. Some of the storms could produce heavy rainfall. Low around 58. East wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 58 °F

    Heavy Rain

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 74. Southeast wind 10 to 15 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 74 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Northeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 57 °F

    Showers
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 66. Northeast wind around 15 mph.

    High: 66 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 52. Northeast wind 10 to 15 mph.

    Low: 52 °F

    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers. Cloudy, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers or sprinkles before 1pm, then a chance of sprinkles between 1pm and 3pm. Cloudy, with a high near 70. Northeast wind around 5 mph. Chance of precipitation is 30%.
Tonight
Mostly cloudy, with a low around 55. Northeast wind around 5 mph.
Friday
A 50 percent chance of showers, mainly after 2pm. Partly sunny, with a high near 68. East wind 5 to 15 mph.
Friday Night
Showers likely, then showers and possibly a thunderstorm after 10pm. Some of the storms could produce heavy rainfall. Low around 58. East wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers and possibly a thunderstorm. High near 74. Southeast wind 10 to 15 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Northeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 66. Northeast wind around 15 mph.
Sunday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 52. Northeast wind 10 to 15 mph.
Monday
A 40 percent chance of showers. Cloudy, with a high near 63.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 50.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sun Prairie WI
 43.17°N 89.21°W (Elev. 948 ft)
Last Update:
9:37 am CDT Sep 17, 2026
Forecast Valid:
10am CDT Sep 17, 2026-6pm CDT Sep 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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