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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 43.17°N 89.21°W (Text-Only)
NWS Forecast for: Sun Prairie WI
Issued by: National Weather Service Milwaukee, WI
Last Update: 12:32 am CDT Jun 30, 2026		Print

  • Overnight

    Overnight: Partly cloudy, with a low around 76. South wind around 10 mph.

    Low: 76 °F

    Partly Cloudy



  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 92. Heat index values as high as 103. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 92 °F

    Hot



  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 74. Southwest wind around 10 mph.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. Heat index values as high as 101. Southwest wind 10 to 15 mph.

    High: 92 °F

    Hot



  • Wednesday
    Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Southwest wind 10 to 15 mph.

    Low: 74 °F

    Chance
    T-storms


  • Thursday

    Thursday: A chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Southwest wind around 10 mph. Chance of precipitation is 40%.

    High: 89 °F

    Chance
    T-storms


  • Thursday
    Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely


  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 87 °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 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely




    • Overnight: Partly cloudy, with a low around 76. South wind around 10 mph.

    Tuesday: Mostly sunny and hot, with a high near 92. Heat index values as high as 103. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 74. Southwest wind around 10 mph.

    Wednesday: Sunny and hot, with a high near 92. Heat index values as high as 101. Southwest wind 10 to 15 mph.

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Southwest wind 10 to 15 mph.

    Thursday: A chance of thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Southwest wind around 10 mph. Chance of precipitation is 40%.

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph. 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 68. Chance of precipitation is 60%.

    Independence Day: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

    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 64.

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


    Sun Prairie WI
     43.17°N 89.21°W (Elev. 948 ft)

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