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 65%
Wind Speed W 16 G 30 mph
Barometer 29.70 in (1007.4 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 17 Jan 1:51 am CST
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: A chance of flurries. Mostly cloudy, with a low around 14. Wind chill values as low as zero. West wind around 15 mph, with gusts as high as 25 mph.

    Low: 14 °F

    Chance
    Flurries

  • Saturday

    Saturday: A slight chance of flurries before 7am, then snow, mainly after noon. 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 80%. New snow accumulation of less than one inch possible.

    High: 19 °F

    Chance Snow
    then Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly before 10pm, then a slight chance of flurries after 11pm. 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. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 7 °F

    Snow Likely
    then Mostly
    Cloudy

  • Sunday

    Sunday: Snow likely after noon. Mostly cloudy, with a high near 18. Wind chill values as low as -7. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 18 °F

    Partly Sunny
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow likely before midnight. Mostly cloudy, with a low around 2. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 2 °F

    Snow Likely
    then Mostly
    Cloudy and
    Blustery

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 7. Blustery.

    High: 7 °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 22.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Overnight
A chance of flurries. Mostly cloudy, with a low around 14. Wind chill values as low as zero. West wind around 15 mph, with gusts as high as 25 mph.
Saturday
A slight chance of flurries before 7am, then snow, mainly after noon. 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 80%. New snow accumulation of less than one inch possible.
Saturday Night
Snow likely, mainly before 10pm, then a slight chance of flurries after 11pm. 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. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday
Snow likely after noon. Mostly cloudy, with a high near 18. Wind chill values as low as -7. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow likely before midnight. Mostly cloudy, with a low around 2. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
M.L.King Day
Partly sunny and cold, with a high near 7. Blustery.
Monday Night
Partly cloudy, with a low around -1.
Tuesday
Mostly sunny, with a high near 22.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 13.
Wednesday
Mostly cloudy, with a high near 27.
Wednesday Night
Mostly cloudy, with a low around 8.
Thursday
Partly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around 5.
Friday
Partly sunny, with a high near 20.
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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:
2:36 am CST Jan 17, 2026
Forecast Valid:
2am 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