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

70°F

21°C

Humidity 73%
Wind Speed NW 5 mph
Barometer 30.00 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 27 Aug 8:45 am CDT
Extended Forecast for

Sussex WI

  • Today

    Today: Mostly sunny, with a high near 80. Northwest wind 5 to 10 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming southwest after midnight.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 80. Southwest wind 5 to 10 mph.

    High: 80 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 80. Northwest wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming southwest after midnight.
Saturday
Mostly cloudy, with a high near 80. Southwest wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 68.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 84.
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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:
8:37 am CDT Aug 27, 2026
Forecast Valid:
9am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation