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

17°F

-8°C

Humidity 54%
Wind Speed NW 5 mph
Barometer 30.02 in (1018.7 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 3 Jan 5:51 am CST
Extended Forecast for

Mc Cullom Lake IL

  • Today

    Today: Mostly cloudy, with a high near 25. West wind around 5 mph.

    High: 25 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 13. West northwest wind around 5 mph becoming calm.

    Low: 13 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 29. Calm wind becoming south around 5 mph in the afternoon. Winds could gust as high as 10 mph.

    High: 29 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of snow, freezing rain, and sleet before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 24. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    Low: 24 °F

    Slight Chance
    Wintry Mix
    then Partly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 40. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 40 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 25. West wind around 5 mph.
Tonight
Partly cloudy, with a low around 13. West northwest wind around 5 mph becoming calm.
Sunday
Increasing clouds, with a high near 29. Calm wind becoming south around 5 mph in the afternoon. Winds could gust as high as 10 mph.
Sunday Night
A slight chance of snow, freezing rain, and sleet before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 24. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 40. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly sunny, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
A chance of rain. Mostly cloudy, with a high near 50.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 37.
Friday
A chance of rain. Partly sunny, with a high near 46.
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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:
3:36 am CST Jan 3, 2026
Forecast Valid:
6am CST Jan 3, 2026-6pm CST Jan 9, 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