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

20°F

-7°C

Humidity 68%
Wind Speed W 15 G 32 mph
Barometer 29.68 in (1006.5 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 17 Jan 12:51 am CST
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: Intermittent flurries with isolated snow showers before 4am, then isolated snow showers after 4am. Mostly cloudy, with a low around 14. Wind chill values as low as 1. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 14 °F

    Isolated Snow
    Showers

  • Saturday

    Saturday: Snow likely, mainly after 3pm. Cloudy, with a high near 19. Wind chill values as low as -1. West southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 19 °F

    Slight Chance
    Snow then
    Snow Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of snow, mainly before 9pm. Mostly cloudy, with a low around 7. Wind chill values as low as -6. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 7 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 50 percent chance of snow after noon. Mostly cloudy, with a high near 19. Wind chill values as low as -6. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 19 °F

    Partly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 0. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 0 °F

    Chance Snow
    then Mostly
    Cloudy and
    Blustery

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 6. Blustery.

    High: 6 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -1.

    Low: -1 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Intermittent flurries with isolated snow showers before 4am, then isolated snow showers after 4am. Mostly cloudy, with a low around 14. Wind chill values as low as 1. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Saturday
Snow likely, mainly after 3pm. Cloudy, with a high near 19. Wind chill values as low as -1. West southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday Night
A 40 percent chance of snow, mainly before 9pm. Mostly cloudy, with a low around 7. Wind chill values as low as -6. West wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
A 50 percent chance of snow after noon. Mostly cloudy, with a high near 19. Wind chill values as low as -6. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 0. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
M.L.King Day
Partly sunny and cold, with a high near 6. Blustery.
Monday Night
Partly cloudy, with a low around -1.
Tuesday
Mostly sunny, with a high near 17.
Tuesday Night
Mostly cloudy, with a low around 11.
Wednesday
A chance of snow after noon. Mostly cloudy, with a high near 27.
Wednesday Night
Mostly cloudy, with a low around 9.
Thursday
Mostly sunny, with a high near 19.
Thursday Night
Mostly cloudy, with a low around 8.
Friday
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:
11:56 pm CST Jan 16, 2026
Forecast Valid:
1am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
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