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

31°F

-1°C

Humidity 76%
Wind Speed W 14 G 22 mph
Barometer 29.78 in (1009.7 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 20 Feb 5:51 pm CST
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 25. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 25 °F

    Cloudy and
    Breezy then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 34. West northwest wind 10 to 15 mph.

    High: 34 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of snow. Cloudy, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 30 °F

    Blustery.
    Chance Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 25. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday
Mostly cloudy, with a high near 34. West northwest wind 10 to 15 mph.
Saturday Night
A 40 percent chance of snow. Cloudy, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North northwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Mostly cloudy, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A chance of rain and snow after noon. Partly sunny, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 26.
Friday
Mostly sunny, with a high near 52.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
6:26 pm CST Feb 20, 2026
Forecast Valid:
6pm CST Feb 20, 2026-6pm CST Feb 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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