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.

Partly Cloudy

68°F

20°C

Humidity 94%
Wind Speed NW 9 mph
Barometer 29.92 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Aug 11:15 pm CDT
Extended Forecast for

Sullivan WI

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Calm wind becoming northwest around 5 mph after midnight.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. Northwest wind 5 to 15 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53. Northwest wind 5 to 10 mph.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. Northwest wind 5 to 10 mph.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. North wind around 5 mph becoming calm.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76. Calm wind becoming northwest around 5 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 80 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.

    Low: 63 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. Calm wind becoming northwest around 5 mph after midnight.
Saturday
Sunny, with a high near 78. Northwest wind 5 to 15 mph.
Saturday Night
Mostly clear, with a low around 53. Northwest wind 5 to 10 mph.
Sunday
Sunny, with a high near 74. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 52. North wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 76. Calm wind becoming northwest around 5 mph.
Monday Night
Partly cloudy, with a low around 57. Calm wind.
Tuesday
Partly sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.
Tuesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan WI
 43.02°N 88.6°W (Elev. 846 ft)
Last Update:
11:21 pm CDT Aug 21, 2026
Forecast Valid:
11pm CDT Aug 21, 2026-6pm CDT Aug 28, 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