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

Hazardous Weather Conditions

Current conditions at

East Troy Municipal Airport (K57C)

Lat: 42.8°NLon: 88.37°WElev: 860ft.

Mostly Cloudy

83°F

28°C

Humidity 76%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 1 Sep 4:55 pm CDT
Extended Forecast for

Jefferson WI

  • This Afternoon

    This Afternoon: Scattered showers and thunderstorms. Mostly cloudy, with a high near 85. Southwest wind around 5 mph. Chance of precipitation is 30%.

    High: 85 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.

    Low: 72 °F

    Scattered
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly 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

    Mostly 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 88. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 88 °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 69. Southeast 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: 69 °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 south in the afternoon. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms. Mostly cloudy, with a high near 85. Southwest wind around 5 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.
Wednesday
Mostly 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 88. Calm wind becoming south around 5 mph in the afternoon. 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 69. Southeast 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 south in the afternoon. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
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 58.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jefferson WI
 43.01°N 88.81°W (Elev. 833 ft)
Last Update:
3:52 pm CDT Sep 1, 2026
Forecast Valid:
5pm 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