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 59%
Wind Speed NW 8 mph
Barometer 30.25 in (1026.0 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 7 Dec 4:51 pm CST
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Scattered snow showers, mainly before 1am. Mostly cloudy, with a temperature falling to near 5 by 8pm, then rising to around 10 during the remainder of the night. Wind chill values as low as -5. North northwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 30%.

    Low: 5 °F⇑

    Scattered
    Snow Showers

  • Monday

    Monday: Mostly cloudy, with a high near 23. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 23 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 26 by 5am. South wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 18 °F⇑

    Slight Chance
    Snow

  • Tuesday

    Tuesday: A slight chance of snow after noon, mixing with rain after 3pm. Cloudy, with a high near 35. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 35 °F

    Cloudy then
    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain and snow before midnight, then rain likely between midnight and 3am, then rain likely, possibly mixed with snow after 3am. Low around 32. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 32 °F

    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 50%.

    High: 35 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A chance of snow. Partly sunny, with a high near 23.

    High: 23 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow

Detailed Forecast

Tonight
Scattered snow showers, mainly before 1am. Mostly cloudy, with a temperature falling to near 5 by 8pm, then rising to around 10 during the remainder of the night. Wind chill values as low as -5. North northwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 23. Light and variable wind becoming south 5 to 10 mph in the morning.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 26 by 5am. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday
A slight chance of snow after noon, mixing with rain after 3pm. Cloudy, with a high near 35. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
Rain and snow before midnight, then rain likely between midnight and 3am, then rain likely, possibly mixed with snow after 3am. Low around 32. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Wednesday
A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 13.
Thursday
A chance of snow. Partly sunny, with a high near 23.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 7.
Friday
A chance of snow. Mostly cloudy, with a high near 16.
Friday Night
A chance of snow. Mostly cloudy, with a low around -1.
Saturday
Partly sunny and cold, with a high near 9.
Saturday Night
Mostly cloudy, with a low around -3.
Sunday
Partly sunny, with a high near 13.
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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 7, 2025
Forecast Valid:
5pm CST Dec 7, 2025-6pm CST Dec 14, 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