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

23°F

-5°C

Humidity 60%
Wind Speed S 6 mph
Barometer 30.24 in (1026.0 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 8 Dec 4:51 pm CST
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: A 30 percent chance of snow, mainly between 11pm and 4am. Cloudy, with a temperature rising to around 24 by 5am. South wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 17 °F⇑

    Chance Snow

  • Tuesday

    Tuesday: A chance of rain or freezing rain after 5pm. Cloudy, with a high near 34. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 34 °F

    Cloudy then
    Chance
    Rain/Freezing
    Rain

  • Tuesday Night

    Tuesday Night: Rain, snow, and freezing rain, becoming all rain after 10pm. Low around 30. Breezy, with a south southwest wind 15 to 25 mph becoming west after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Breezy.
    Wintry Mix
    then Rain
    Likely

  • Wednesday

    Wednesday: Snow likely, mainly before noon. Cloudy, with a high near 33. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 33 °F

    Breezy. Snow
    Likely then
    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 11. Northwest wind 5 to 15 mph.

    Low: 11 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 22.

    High: 22 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 6.

    Low: 6 °F

    Chance Snow

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 21.

    High: 21 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow before midnight. Mostly cloudy, with a low around -1.

    Low: -1 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
A 30 percent chance of snow, mainly between 11pm and 4am. Cloudy, with a temperature rising to around 24 by 5am. South wind 5 to 15 mph, with gusts as high as 30 mph.
Tuesday
A chance of rain or freezing rain after 5pm. Cloudy, with a high near 34. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tuesday Night
Rain, snow, and freezing rain, becoming all rain after 10pm. Low around 30. Breezy, with a south southwest wind 15 to 25 mph becoming west after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.
Wednesday
Snow likely, mainly before noon. Cloudy, with a high near 33. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 11. Northwest wind 5 to 15 mph.
Thursday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 22.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 6.
Friday
A chance of snow. Mostly cloudy, with a high near 21.
Friday Night
A chance of snow before midnight. Mostly cloudy, with a low around -1.
Saturday
Partly sunny and cold, with a high near 7.
Saturday Night
Mostly cloudy, with a low around -4.
Sunday
Mostly sunny, with a high near 14.
Sunday Night
Mostly cloudy, with a low around 3.
Monday
A chance of snow. Mostly cloudy, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
3:11 pm CST Dec 8, 2025
Forecast Valid:
5pm CST Dec 8, 2025-6pm CST Dec 15, 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