Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Overcast

57°F

14°C

Humidity 77%
Wind Speed E 14 mph
Barometer 30.14 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 14 Oct 4:45 pm CDT
Extended Forecast for

Sullivan WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Northeast wind around 5 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 11am.  High near 57. East wind 5 to 10 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 1am.  Low around 45. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Showers then
    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers.  Mostly cloudy, with a high near 54. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.

    High: 54 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am.  Otherwise, mostly clear, with a low around 32. North wind 10 to 15 mph becoming light  after midnight.

    Low: 32 °F

    Partly Cloudy
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am.  Otherwise, sunny, with a high near 56. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 56 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36. Southwest wind 5 to 10 mph.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. Northeast wind around 5 mph.
Thursday
Showers, mainly after 11am. High near 57. East wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 1am. Low around 45. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 54. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.
Friday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. North wind 10 to 15 mph becoming light after midnight.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 56. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Clear, with a low around 36. Southwest wind 5 to 10 mph.
Sunday
Sunny, with a high near 63. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Mostly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan WI
 43°N 88.6°W (Elev. 846 ft)
3:32 pm CDT Oct 14, 2026
5pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database