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

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

18°F

-8°C

Humidity 88%
Wind Speed W 13 G 21 mph
Barometer 29.98 in (1017.2 mb)
Dewpoint 15°F (-9°C)
Visibility 9.00 mi
Wind Chill5°F (-15°C)
Last update 2 Dec 4:51 pm CST
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Cloudy, with a temperature rising to around 23 by 5am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 18 °F⇑

    Cloudy

  • Wednesday

    Wednesday: A chance of snow showers between 9am and 3pm. Cloudy, with a high near 31. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    High: 31 °F

    Chance Snow
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -1. Wind chill values as low as -14. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: -1 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 14. Wind chill values as low as -15. Northwest wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 10 mph.

    High: 14 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -4. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: -4 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
Cloudy, with a temperature rising to around 23 by 5am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
A chance of snow showers between 9am and 3pm. Cloudy, with a high near 31. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -1. Wind chill values as low as -14. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 14. Wind chill values as low as -15. Northwest wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
Partly cloudy, with a low around -4. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Partly sunny, with a high near 22.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14.
Saturday
Partly sunny, with a high near 26.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 13.
Sunday
A chance of snow. Mostly cloudy, with a high near 25.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 10.
Monday
Partly sunny, with a high near 25.
Monday Night
A chance of snow. Cloudy, with a low around 16.
Tuesday
A chance of snow. Mostly cloudy, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
4:36 pm CST Dec 2, 2025
Forecast Valid:
5pm CST Dec 2, 2025-6pm CST Dec 9, 2025
 
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