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

Wittman Regional Airport (KOSH)

Lat: 43.97°NLon: 88.56°WElev: 801ft.

Fair

64°F

18°C

Humidity 93%
Wind Speed SW 6 mph
Barometer 29.86 in (1010.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 Aug 8:53 pm CDT
Extended Forecast for

Winnebago WI

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 59. West wind around 6 mph becoming light and variable after midnight.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. Northwest wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Light west southwest wind increasing to 5 to 9 mph in the morning.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind around 8 mph.

    Low: 63 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 59. West wind around 6 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 79. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 58. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 81. Light west southwest wind increasing to 5 to 9 mph in the morning.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind around 8 mph.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 58.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winnebago WI
 44.08°N 88.53°W (Elev. 787 ft)
Last Update:
8:36 pm CDT Aug 18, 2026
Forecast Valid:
9pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation