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

69°F

21°C

Humidity 38%
Wind Speed SW 8 G 23 mph
Barometer 29.71 in (1005.9 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 25 Mar 4:53 pm CDT
Extended Forecast for

Green Lake WI

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Southwest wind 5 to 10 mph becoming northeast after midnight.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers before 8am, then a chance of showers after 9am. Mostly cloudy, with a high near 53. Northeast wind 5 to 15 mph. Chance of precipitation is 40%.

    High: 53 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23. North wind 10 to 15 mph.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow after 1pm. Mostly sunny, with a high near 41. North wind 5 to 10 mph.

    High: 41 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming clear, with a low around 23. Northwest wind 5 to 10 mph.

    Low: 23 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 49. West wind 5 to 15 mph.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. South wind around 10 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 60. South wind 10 to 15 mph.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Southwest wind 5 to 10 mph becoming northeast after midnight.
Thursday
A slight chance of showers before 8am, then a chance of showers after 9am. Mostly cloudy, with a high near 53. Northeast wind 5 to 15 mph. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 23. North wind 10 to 15 mph.
Friday
A 20 percent chance of snow after 1pm. Mostly sunny, with a high near 41. North wind 5 to 10 mph.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 23. Northwest wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 49. West wind 5 to 15 mph.
Saturday Night
Partly cloudy, with a low around 34. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 60. South wind 10 to 15 mph.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 62.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 37.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 58.
Tuesday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 42.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Green Lake WI
 43.86°N 88.96°W (Elev. 850 ft)
Last Update:
5:32 pm CDT Mar 25, 2026
Forecast Valid:
5pm CDT Mar 25, 2026-6pm CDT Apr 1, 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