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

19°F

-7°C

Humidity 74%
Wind Speed SW 5 mph
Barometer 30.36 in (1030.4 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 8 Dec 9:51 am CST
Extended Forecast for

Long Lake IL

  • Today

    Today: Mostly cloudy, with a high near 24. South wind 5 to 10 mph.

    High: 24 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of snow, mainly between 11pm and 3am. Mostly cloudy, with a temperature rising to around 25 by 5am. South wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 17 °F⇑

    Chance Snow

  • Tuesday

    Tuesday: A 20 percent chance of rain after 3pm. Cloudy, with a high near 36. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 36 °F

    Cloudy then
    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow, becoming all rain after midnight. Low around 32. Breezy, with a south southwest wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain/Snow
    then Rain
    Likely and
    Breezy

  • Wednesday

    Wednesday: Rain and snow likely, becoming all snow after 9am. Mostly cloudy, with a high near 36. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 36 °F

    Rain/Snow
    Likely and
    Breezy then
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 9.

    Low: 9 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A 20 percent chance of snow. Partly sunny, with a high near 22.

    High: 22 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 9.

    Low: 9 °F

    Chance Snow

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 18.

    High: 18 °F

    Chance Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 24. South wind 5 to 10 mph.
Tonight
A 30 percent chance of snow, mainly between 11pm and 3am. Mostly cloudy, with a temperature rising to around 25 by 5am. South wind 5 to 15 mph, with gusts as high as 30 mph.
Tuesday
A 20 percent chance of rain after 3pm. Cloudy, with a high near 36. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Rain, possibly mixed with snow, becoming all rain after midnight. Low around 32. Breezy, with a south southwest wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
Rain and snow likely, becoming all snow after 9am. Mostly cloudy, with a high near 36. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 9.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 22.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 9.
Friday
A chance of snow. Mostly cloudy, with a high near 18.
Friday Night
A chance of snow before midnight. Mostly cloudy, with a low around -2.
Saturday
Partly sunny and cold, with a high near 8.
Saturday Night
Mostly cloudy, with a low around -2.
Sunday
Partly sunny, with a high near 16.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
9:11 am CST Dec 8, 2025
Forecast Valid:
10am CST Dec 8, 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