Current conditions at

Wittman Regional Airport (KOSH)

Lat: 43.97°NLon: 88.56°WElev: 801ft.

Fair

76°F

24°C

Humidity 82%
Wind Speed SE 12 mph
Barometer 29.98 in (1014.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 16 Aug 2:53 pm CDT
Extended Forecast for

Green Lake WI

Flood Watch August 16, 04:00pm until August 17, 10:00am
Severe T-storm Watch August 16, 03:06pm until August 16, 07:00pm
Click here for hazard details and duration
Flood Watch
Severe T-storm Watch
  •  
    Severe T-storm Watch August 16, 03:06pm until August 16, 07:00pm

    NOW until 7:00pm Sat

    Severe T-storm Watch

  • This Afternoon

    High: 79 °F

    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 4am.  Mostly cloudy, with a low around 67. North wind around 5 mph becoming calm.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 77. Northeast wind 10 to 15 mph.

    High: 77 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 64. East wind 5 to 10 mph.

    Low: 64 °F

    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm.  Partly sunny, with a high near 84. Southeast wind around 10 mph becoming southwest in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Showers
    Likely then
    T-storms
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 67 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 79. North wind 5 to 10 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. North wind around 5 mph.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Showers and thunderstorms. High near 79. Southeast wind around 5 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before 4am. Mostly cloudy, with a low around 67. North wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Northeast wind 10 to 15 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East wind 5 to 10 mph.
Monday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 84. Southeast wind around 10 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming northwest after midnight.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. North wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 59. North wind around 5 mph.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Green Lake WI
 43.83°N 88.94°W (Elev. 869 ft)
2:12 pm CDT Aug 16, 2025
3pm CDT Aug 16, 2025-6pm CDT Aug 23, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database