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.

Mostly Cloudy

43°F

6°C

Humidity 76%
Wind Speed W 15 G 30 mph
Barometer 29.68 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 18 Apr 5:45 am CDT
Extended Forecast for

Sussex WI

  • Today

    Today: Partly sunny, with a high near 48. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 48 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 31. West wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 47. West wind 5 to 15 mph.

    High: 47 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. South wind around 10 mph.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69. West wind around 10 mph.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. Northeast wind around 5 mph.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 48. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 31. West wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 47. West wind 5 to 15 mph.
Sunday Night
Partly cloudy, with a low around 28. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 40. South wind around 10 mph.
Tuesday
Mostly sunny, with a high near 69. West wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 42. Northeast wind around 5 mph.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sussex WI
 43.14°N 88.24°W (Elev. 951 ft)
Last Update:
5:46 am CDT Apr 18, 2026
Forecast Valid:
6am CDT Apr 18, 2026-6pm CDT Apr 24, 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