National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

21°F

-6°C

Humidity 88%
Wind Speed S 7 mph
Barometer 30.00 in (1018.0 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 21 Jan 2:51 am CST
Extended Forecast for

Mc Cullom Lake IL

Extreme Cold Watch January 23, 03:00am until January 23, 12:00pm
Click here for hazard details and duration
Extreme Cold Watch

  • Overnight

    Overnight: Snow likely, mainly before 5am. Cloudy, with a steady temperature around 20. South southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of 1 to 3 inches possible.

    Low: 20 °F

    Snow Likely

  • Wednesday

    Wednesday: A chance of snow before 10am, then a chance of snow showers after 5pm. Mostly cloudy, with a high near 26. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 26 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Snow showers likely, mainly before 10pm. Patchy blowing snow before 3am. Mostly cloudy, with a low around 9. Wind chill values as low as -6. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 9 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Thursday

    Thursday: A 20 percent chance of snow showers after 3pm. Increasing clouds, with a high near 20. Wind chill values as low as -6. West wind around 15 mph, with gusts as high as 30 mph.

    High: 20 °F

    Sunny then
    Slight Chance
    Snow Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -13. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: -13 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -5.

    High: -5 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -14.

    Low: -14 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 3.

    High: 3 °F

    Cold

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around -4.

    Low: -4 °F

    Chance Snow

Detailed Forecast

Overnight
Snow likely, mainly before 5am. Cloudy, with a steady temperature around 20. South southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of 1 to 3 inches possible.
Wednesday
A chance of snow before 10am, then a chance of snow showers after 5pm. Mostly cloudy, with a high near 26. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Wednesday Night
Snow showers likely, mainly before 10pm. Patchy blowing snow before 3am. Mostly cloudy, with a low around 9. Wind chill values as low as -6. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Thursday
A 20 percent chance of snow showers after 3pm. Increasing clouds, with a high near 20. Wind chill values as low as -6. West wind around 15 mph, with gusts as high as 30 mph.
Thursday Night
Partly cloudy, with a low around -13. West northwest wind around 15 mph, with gusts as high as 25 mph.
Friday
Sunny and cold, with a high near -5.
Friday Night
Mostly cloudy, with a low around -14.
Saturday
Partly sunny and cold, with a high near 3.
Saturday Night
A chance of snow. Mostly cloudy, with a low around -4.
Sunday
A chance of snow. Mostly cloudy, with a high near 11.
Sunday Night
Partly cloudy, with a low around -4.
Monday
Sunny, with a high near 13.
Monday Night
Partly cloudy, with a low around 2.
Tuesday
Partly sunny, with a high near 21.
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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:
2:17 am CST Jan 21, 2026
Forecast Valid:
3am CST Jan 21, 2026-6pm CST Jan 27, 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