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.

Light Rain

38°F

3°C

Humidity 89%
Wind Speed SW 18 G 28 mph
Barometer 29.24 in (990.9 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 10 Dec 12:51 am CST
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: A chance of rain before 4am, then a chance of rain and snow between 4am and 5am, then snow likely after 5am. Cloudy, with a steady temperature around 34. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely and
    Breezy

  • Wednesday

    Wednesday: Snow, mainly before 10am. Temperature falling to around 24 by 5pm. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 32 °F⇓

    Breezy. Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Cloudy during the early evening, then gradual clearing, with a low around 9. Wind chill values as low as -1. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 9 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 21. Wind chill values as low as -1. West northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 21 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 16. Southwest wind around 5 mph becoming calm.

    Low: 16 °F

    Chance Snow

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 11.

    High: 11 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow before midnight. Mostly cloudy, with a low around -6.

    Low: -6 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A chance of rain before 4am, then a chance of rain and snow between 4am and 5am, then snow likely after 5am. Cloudy, with a steady temperature around 34. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday
Snow, mainly before 10am. Temperature falling to around 24 by 5pm. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 20 percent chance of snow before midnight. Cloudy during the early evening, then gradual clearing, with a low around 9. Wind chill values as low as -1. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Increasing clouds, with a high near 21. Wind chill values as low as -1. West northwest wind around 5 mph, with gusts as high as 15 mph.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 16. Southwest wind around 5 mph becoming calm.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 27.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 5.
Saturday
A chance of snow. Mostly cloudy, with a high near 11.
Saturday Night
A chance of snow before midnight. Mostly cloudy, with a low around -6.
Sunday
Mostly sunny and cold, with a high near 7.
Sunday Night
Partly cloudy, with a low around -3.
Monday
Mostly cloudy, with a high near 20.
Monday Night
Mostly cloudy, with a low around 8.
Tuesday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
12:01 am CST Dec 10, 2025
Forecast Valid:
1am CST Dec 10, 2025-6pm CST Dec 16, 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