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

Hazardous Weather Conditions

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Mostly Cloudy

79°F

26°C

Humidity 84%
Wind Speed E 9 mph
Barometer 29.82 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 12 Aug 6:45 pm CDT
Extended Forecast for

Hartland WI

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A 50 percent chance of showers, mainly between 10am and 5pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 77 °F

    Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: A slight chance of showers before 7pm, then a chance of showers after 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 77. East wind 5 to 10 mph.

    High: 77 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 64. East wind around 5 mph. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Chance
    Showers

  • 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 67. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Northwest wind around 5 mph.

    High: 80 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 65. Calm wind.
Thursday
A 50 percent chance of showers, mainly between 10am and 5pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
A slight chance of showers before 7pm, then a chance of showers after 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 77. East wind 5 to 10 mph.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 64. East wind around 5 mph. Chance of precipitation is 40%.
Saturday
A 40 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 79. Southeast 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 67. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Northwest wind around 5 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 59.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 78.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hartland WI
 43.1°N 88.36°W (Elev. 1001 ft)
Last Update:
5:46 pm CDT Aug 12, 2026
Forecast Valid:
7pm CDT Aug 12, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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