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

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Fair

46°F

8°C

Humidity 100%
Wind Speed S 2 mph
Barometer 30.33 in
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Last update 1 Nov 4:35 am CST
Extended Forecast for

Sullivan WI

  • Today

    Today: Mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.

    High: 64 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. South wind around 5 mph.

    Low: 51 °F

    Mostly Cloudy

  • Monday

    Monday: Showers likely, mainly between noon and 3pm. Cloudy, with a high near 64. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers. Low around 56. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Showers

  • Tuesday

    Tuesday: Showers, mainly after noon. High near 71. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 71 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers. Low around 53. South wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 53 °F

    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 48. West wind around 5 mph.

    Low: 48 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain. Mostly cloudy, with a high near 61.

    High: 61 °F

    Chance Rain

Detailed Forecast

Today
Mostly cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 51. South wind around 5 mph.
Monday
Showers likely, mainly between noon and 3pm. Cloudy, with a high near 64. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Showers. Low around 56. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers, mainly after noon. High near 71. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers. Low around 53. South wind 10 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 48. West wind around 5 mph.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 61.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 58.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan WI
 43.02°N 88.6°W (Elev. 846 ft)
Last Update:
3:33 am CST Nov 1, 2026
Forecast Valid:
5am CST Nov 1, 2026-6pm CST Nov 7, 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