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

Hazardous Weather Conditions

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Fair

77°F

25°C

Humidity 65%
Wind Speed NW 12 G 17 mph
Barometer 29.88 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 26 Aug 10:45 am CDT
Extended Forecast for

Sullivan WI

  • Today

    Today: Mostly sunny, with a high near 82. West wind 10 to 15 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 61. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Northwest wind around 5 mph.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Southeast wind around 5 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind 10 to 15 mph. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 82. West wind 10 to 15 mph.
Tonight
Mostly clear, with a low around 61. Northwest wind 5 to 10 mph becoming light after midnight.
Thursday
Mostly sunny, with a high near 80. Northwest wind around 5 mph.
Thursday Night
Mostly clear, with a low around 56. Calm wind.
Friday
Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 59. Southeast wind around 5 mph.
Saturday
Partly sunny, with a high near 81. South wind 5 to 10 mph.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind 10 to 15 mph. Chance of precipitation is 40%.
Sunday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 86.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan WI
 43°N 88.6°W (Elev. 846 ft)
Last Update:
8:36 am CDT Aug 26, 2026
Forecast Valid:
11am CDT Aug 26, 2026-6pm CDT Sep 1, 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