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

10°F

-12°C

Humidity 72%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 17 Mar 4:35 am CDT
Extended Forecast for

Sussex WI

  • Today

    Today: Increasing clouds, with a high near 21. Wind chill values between -5 and -15. Northwest wind 5 to 10 mph.

    High: 21 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow, mainly after midnight. Low around 16. South wind 5 to 10 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 16 °F

    Chance Snow
    then Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before 7am. Mostly cloudy, with a high near 39. Southwest wind around 10 mph.

    High: 39 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Partly sunny, with a high near 45. Southwest wind around 5 mph becoming north in the afternoon.

    High: 45 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. Calm wind becoming west around 5 mph after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 48. West wind 5 to 10 mph.

    High: 48 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. Northwest wind around 5 mph becoming southwest after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 21. Wind chill values between -5 and -15. Northwest wind 5 to 10 mph.
Tonight
Snow, mainly after midnight. Low around 16. South wind 5 to 10 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
A 30 percent chance of snow before 7am. Mostly cloudy, with a high near 39. Southwest wind around 10 mph.
Wednesday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph.
Thursday
Partly sunny, with a high near 45. Southwest wind around 5 mph becoming north in the afternoon.
Thursday Night
Mostly cloudy, with a low around 32. Calm wind becoming west around 5 mph after midnight.
Friday
Mostly cloudy, with a high near 48. West wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 33. Northwest wind around 5 mph becoming southwest after midnight.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
A slight chance of rain and snow. Mostly cloudy, with a high near 49. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sussex WI
 43.14°N 88.24°W (Elev. 951 ft)
Last Update:
3:32 am CDT Mar 17, 2026
Forecast Valid:
4am CDT Mar 17, 2026-6pm CDT Mar 23, 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