Forecast

    Forecast for Sun Prairie, WI | Forecast Periods: 14
    Monday
    Mar 16
    2026

    Sun Prairie, WI

    Updated: 10:34 PM CDT

    0°F

    Chance Light Snow

    10 mph NW
    Precipitation: 35%

    A chance of snow before 1am. Mostly cloudy, with a low around 0. Wind chill values as low as -11. Northwest wind 10 to 15 mph. Chance of precipitation is 40%.

    Hourly Forecast

    TUE22:00
    15°F
    Chance Light Snow
    Dewpoint:-14.4°Precip:35%Humidity:67%Wind:15 mph NW
    TUE23:00
    13°F
    Chance Light Snow
    Dewpoint:-15.6°Precip:31%Humidity:67%Wind:15 mph NW
    TUE00:00
    11°F
    Chance Light Snow
    Dewpoint:-16.1°Precip:25%Humidity:69%Wind:15 mph NW
    TUE01:00
    9°F
    Mostly Cloudy
    Dewpoint:-16.7°Precip:2%Humidity:72%Wind:15 mph NW
    TUE02:00
    8°F
    Mostly Cloudy
    Dewpoint:-17.2°Precip:0%Humidity:72%Wind:15 mph NW
    TUE03:00
    7°F
    Mostly Cloudy
    Dewpoint:-17.8°Precip:0%Humidity:72%Wind:10 mph NW
    TUE04:00
    6°F
    Partly Cloudy
    Dewpoint:-18.3°Precip:1%Humidity:72%Wind:10 mph NW
    TUE05:00
    4°F
    Mostly Clear
    Dewpoint:-19.4°Precip:1%Humidity:72%Wind:10 mph NW
    TUE06:00
    2°F
    Sunny
    Dewpoint:-20°Precip:0%Humidity:75%Wind:10 mph NW
    TUE07:00
    1°F
    Sunny
    Dewpoint:-20.6°Precip:0%Humidity:75%Wind:10 mph NW
    TUE08:00
    2°F
    Sunny
    Dewpoint:-20°Precip:0%Humidity:75%Wind:10 mph NW
    TUE09:00
    5°F
    Sunny
    Dewpoint:-18.9°Precip:0%Humidity:72%Wind:10 mph NW
    TUE10:00
    9°F
    Sunny
    Dewpoint:-17.8°Precip:0%Humidity:66%Wind:10 mph NW
    TUE11:00
    11°F
    Sunny
    Dewpoint:-16.7°Precip:0%Humidity:66%Wind:10 mph W
    TUE12:00
    13°F
    Mostly Sunny
    Dewpoint:-16.1°Precip:0%Humidity:63%Wind:5 mph W
    TUE13:00
    16°F
    Mostly Sunny
    Dewpoint:-15°Precip:0%Humidity:61%Wind:5 mph W
    TUE14:00
    18°F
    Partly Sunny
    Dewpoint:-14.4°Precip:0%Humidity:59%Wind:5 mph W
    TUE15:00
    19°F
    Mostly Sunny
    Dewpoint:-14.4°Precip:0%Humidity:56%Wind:5 mph SW
    TUE16:00
    20°F
    Mostly Cloudy
    Dewpoint:-13.9°Precip:1%Humidity:56%Wind:5 mph SW
    TUE17:00
    20°F
    Mostly Cloudy
    Dewpoint:-13.3°Precip:2%Humidity:59%Wind:5 mph SW
    TUE18:00
    19°F
    Mostly Cloudy
    Dewpoint:-13.3°Precip:4%Humidity:61%Wind:5 mph S
    WED19:00
    19°F
    Cloudy
    Dewpoint:-12.8°Precip:7%Humidity:64%Wind:5 mph S
    WED20:00
    18°F
    Slight Chance Light Snow
    Dewpoint:-12.2°Precip:15%Humidity:70%Wind:10 mph S
    WED21:00
    17°F
    Chance Light Snow
    Dewpoint:-11.7°Precip:38%Humidity:77%Wind:10 mph S

    Extended Forecast

    Tuesday

    Tue, Mar 17
    21°F
    Mostly Sunny
    5 mph W
    Precipitation: 2%
    Mostly sunny, with a high near 21. Wind chill values as low as -13. West wind 5 to 10 mph.

    Tuesday Night

    Tue, Mar 17
    16°F
    Snow
    5 mph S
    Precipitation: 100%
    Snow after 8pm. Cloudy. Low around 16, with temperatures rising to around 21 overnight. South wind 5 to 10 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Wednesday

    Wed, Mar 18
    40°F
    Chance Light Snow then Mostly Cloudy
    5 mph SW
    Precipitation: 44%
    A chance of snow before 7am. Mostly cloudy, with a high near 40. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.

    Wednesday Night

    Wed, Mar 18
    32°F
    Mostly Cloudy then Slight Chance Light Rain
    5 mph SW
    Precipitation: 21%
    A slight chance of rain after 1am. Mostly cloudy, with a low around 32. Southwest wind around 5 mph. Chance of precipitation is 20%.

    Thursday

    Thu, Mar 19
    42°F
    Slight Chance Light Rain then Mostly Sunny
    0 mph W
    Precipitation: 21%
    A slight chance of rain before 7am. Mostly sunny, with a high near 42. West wind 0 to 5 mph. Chance of precipitation is 20%.

    Thursday Night

    Thu, Mar 19
    33°F
    Mostly Cloudy
    0 mph S
    Precipitation: 1%
    Mostly cloudy, with a low around 33. South wind 0 to 5 mph.

    Friday

    Fri, Mar 20
    50°F
    Partly Sunny
    5 mph SW
    Precipitation: 3%
    Partly sunny, with a high near 50. Southwest wind 5 to 10 mph.

    Friday Night

    Fri, Mar 20
    34°F
    Mostly Cloudy
    5 mph SW
    Precipitation: 7%
    Mostly cloudy, with a low around 34.

    Saturday

    Sat, Mar 21
    54°F
    Mostly Sunny
    10 mph W
    Precipitation: 5%
    Mostly sunny, with a high near 54.

    Saturday Night

    Sat, Mar 21
    34°F
    Mostly Cloudy then Slight Chance Rain And Snow
    10 mph NW
    Precipitation: 15%
    A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 20%.

    Sunday

    Sun, Mar 22
    49°F
    Slight Chance Rain And Snow then Partly Sunny
    10 mph NW
    Precipitation: 15%
    A slight chance of rain and snow before 7am. Partly sunny, with a high near 49. Chance of precipitation is 20%.

    Sunday Night

    Sun, Mar 22
    25°F
    Mostly Cloudy
    5 mph N
    Precipitation: 3%
    Mostly cloudy, with a low around 25.

    Monday

    Mon, Mar 23
    41°F
    Partly Sunny
    5 mph NE
    Precipitation: 3%
    Partly sunny, with a high near 41.

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