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

38°F

3°C

Humidity 68%
Wind Speed W 7 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 14 Feb 1:51 am CST
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 54 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.

    Low: 31 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 54. West southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 15 mph.

    Low: 34 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 28. Calm wind.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 54. West southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.
Sunday Night
Partly cloudy, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 15 mph.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain before noon. Mostly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
A chance of rain. Partly sunny, with a high near 46.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
1:46 am CST Feb 14, 2026
Forecast Valid:
2am CST Feb 14, 2026-6pm CST Feb 20, 2026
 
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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