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

49°F

9°C

Humidity 69%
Wind Speed N 14 G 21 mph
Barometer 29.85 in (1011.4 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 20 Mar 4:51 pm CDT
Extended Forecast for

Mc Cullom Lake IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. North wind 5 to 10 mph becoming east southeast after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 71. East southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 71 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 48. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 28. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. North wind 5 to 10 mph becoming east southeast after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 71. East southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 46. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.
Sunday
A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 48. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 28. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 39.
Thursday
A chance of showers. Mostly cloudy, with a high near 63.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mc Cullom Lake IL
 42.36°N 88.29°W
Last Update:
4:06 pm CDT Mar 20, 2026
Forecast Valid:
5pm CDT Mar 20, 2026-6pm CDT Mar 27, 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