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

36°F

2°C

Humidity 73%
Wind Speed SE 7 mph
Barometer 30.20 in (1023.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 24 Mar 11:51 pm CDT
Extended Forecast for

Long Lake IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. Southeast wind around 5 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 68. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 68 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. South southwest wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 72 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of rain showers, mixing with snow after 10pm, then gradually ending. Mostly cloudy, with a low around 28. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow

  • Friday

    Friday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. Southeast wind around 5 mph.
Wednesday
Partly sunny, with a high near 68. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 51. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. South southwest wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A slight chance of rain showers, mixing with snow after 10pm, then gradually ending. Mostly cloudy, with a low around 28. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
A chance of showers. Mostly cloudy, with a low around 46.
Tuesday
A chance of showers. Mostly cloudy, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
12:20 am CDT Mar 25, 2026
Forecast Valid:
12am CDT Mar 25, 2026-6pm CDT Mar 31, 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