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

East Troy Municipal Airport (K57C)

Lat: 42.8°NLon: 88.37°WElev: 860ft.

Fair

56°F

13°C

Humidity 92%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Jun 11:55 pm CDT
Extended Forecast for

Jefferson WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: A 50 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 52. East wind 5 to 10 mph becoming north after midnight.

    Low: 52 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 75. Northeast wind around 10 mph.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Northeast wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Calm wind becoming west around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. West wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 53. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. Calm wind.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A 50 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 52. East wind 5 to 10 mph becoming north after midnight.
Monday
Mostly sunny, with a high near 75. Northeast wind around 10 mph.
Monday Night
Mostly clear, with a low around 50. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 76. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 55. South wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. West wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 53.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Jefferson WI
 43.01°N 88.81°W (Elev. 833 ft)
Last Update:
11:32 pm CDT Jun 20, 2026
Forecast Valid:
12am CDT Jun 21, 2026-6pm CDT Jun 27, 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