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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 43.01°N 88.24°W (Text-Only)
NWS Forecast for: Waukesha WI
Issued by: National Weather Service Milwaukee, WI
Last Update: 11:17 pm CDT Jun 29, 2026		Print

  • Tonight

    Tonight: Mostly clear, with a low around 76. Southwest wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear



  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 94 °F

    Hot



  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph.

    Low: 75 °F

    Partly Cloudy



  • Wednesday

    Wednesday: Sunny and hot, with a high near 94. Heat index values as high as 102. Southwest wind 10 to 15 mph.

    High: 94 °F

    Hot



  • Wednesday
    Night

    Wednesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 75. Southwest wind around 10 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 92. Southwest wind around 10 mph. Chance of precipitation is 40%.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Showers
    Likely


  • Friday
    Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely




    • Tonight: Mostly clear, with a low around 76. Southwest wind 5 to 10 mph.

    Tuesday: Mostly sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Tuesday Night: Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph.

    Wednesday: Sunny and hot, with a high near 94. Heat index values as high as 102. Southwest wind 10 to 15 mph.

    Wednesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 75. Southwest wind around 10 mph. Chance of precipitation is 20%.

    Thursday: A slight chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 92. Southwest wind around 10 mph. Chance of precipitation is 40%.

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Independence Day: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

    Sunday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.

    Monday: A 20 percent chance of showers. Mostly sunny, with a high near 83.


    Waukesha WI
     43.01°N 88.24°W (Elev. 922 ft)

    Visit your local NWS office at: https://www.weather.gov/mkx