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.

Fair

32°F

0°C

Humidity 82%
Wind Speed W 7 mph
Barometer 29.85 in (1011.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 27 Feb 2:51 am CST
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: Mostly clear, with a low around 26. Southwest wind around 5 mph.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 60. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 60 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18. North wind around 5 mph, with gusts as high as 15 mph.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow

  • Monday

    Monday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 26. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 60. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
Partly cloudy, with a low around 27. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Mostly cloudy, with a low around 18. North wind around 5 mph, with gusts as high as 15 mph.
Sunday
Partly sunny, with a high near 30.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 20.
Monday
Partly sunny, with a high near 36.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
A chance of rain. Mostly cloudy, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A chance of rain. Partly sunny, with a high near 46.
Wednesday Night
Rain likely. Cloudy, with a low around 36.
Thursday
Rain likely. Mostly cloudy, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
2:26 am CST Feb 27, 2026
Forecast Valid:
3am CST Feb 27, 2026-6pm CST Mar 5, 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