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

Hazardous Weather Conditions

Current conditions at

Wittman Regional Airport (KOSH)

Lat: 43.97°NLon: 88.56°WElev: 801ft.

A Few Clouds

72°F

22°C

Humidity 82%
Wind Speed E 8 mph
Barometer 30.10 in (1018.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 15 Aug 8:53 am CDT
Extended Forecast for

Winnebago WI

  • Today

    Today: Mostly cloudy, with a high near 80. Heat index values as high as 83. East southeast wind 8 to 11 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of showers and thunderstorms. Patchy fog between 1am and 3am. Otherwise, mostly cloudy, with a low around 69. Southeast wind 5 to 8 mph becoming light and variable in the evening. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 83. Heat index values as high as 86. Northwest wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 83 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. North northwest wind 5 to 9 mph becoming light after midnight.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. West northwest wind 3 to 7 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 80. Heat index values as high as 83. East southeast wind 8 to 11 mph.
Tonight
A chance of showers and thunderstorms. Patchy fog between 1am and 3am. Otherwise, mostly cloudy, with a low around 69. Southeast wind 5 to 8 mph becoming light and variable in the evening. Chance of precipitation is 30%.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 83. Heat index values as high as 86. Northwest wind 5 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 61. North northwest wind 5 to 9 mph becoming light after midnight.
Monday
Sunny, with a high near 82. West northwest wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 58.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winnebago WI
 44.06°N 88.53°W (Elev. 758 ft)
Last Update:
8:46 am CDT Aug 15, 2026
Forecast Valid:
9am CDT Aug 15, 2026-6pm CDT Aug 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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