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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley through this week. 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

East Troy Municipal Airport (K57C)

Lat: 42.8°NLon: 88.37°WElev: 860ft.

Fair

67°F

19°C

Humidity 93%
Wind Speed Calm
Barometer 30.12 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 15 Sep 7:55 pm CDT
Extended Forecast for

Mukwonago WI

  • Tonight

    Tonight: Isolated sprinkles between 1am and 2am. Mostly cloudy, with a low around 59. Northwest wind around 5 mph becoming northeast after midnight.

    Low: 59 °F

    Isolated
    Sprinkles

  • Wednesday

    Wednesday: Isolated sprinkles after 1pm. Mostly cloudy, with a high near 69. East wind 5 to 10 mph.

    High: 69 °F

    Isolated
    Sprinkles

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 74. Calm wind becoming north around 5 mph in the afternoon.

    High: 74 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 59. Northeast wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 61. Southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 61 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 75. South wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 75 °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 61. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely

Detailed Forecast

Tonight
Isolated sprinkles between 1am and 2am. Mostly cloudy, with a low around 59. Northwest wind around 5 mph becoming northeast after midnight.
Wednesday
Isolated sprinkles after 1pm. Mostly cloudy, with a high near 69. East wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 74. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 59. Northeast wind around 5 mph becoming calm.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 61. Southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Saturday
Showers and possibly a thunderstorm. High near 75. South wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch 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 61. Chance of precipitation is 60%.
Sunday
A 40 percent chance of showers. Cloudy, with a high near 68.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Monday
A 30 percent chance of showers. Mostly cloudy, with a high near 68.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mukwonago WI
 42.86°N 88.34°W (Elev. 791 ft)
Last Update:
8:06 pm CDT Sep 15, 2026
Forecast Valid:
8pm CDT Sep 15, 2026-6pm CDT Sep 22, 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