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

72°F

22°C

Humidity 68%
Wind Speed NE 10 mph
Barometer 30.11 in (1018.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 6 Sep 4:51 pm CDT
Extended Forecast for

Mc Cullom Lake IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. East wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.

    Low: 58 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 79. Light and variable wind becoming east southeast 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 60. South southeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 60 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 84. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 84 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. South wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.

    Low: 69 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. East wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.
Labor Day
Mostly sunny, with a high near 79. Light and variable wind becoming east southeast 5 to 10 mph in the morning.
Monday Night
Mostly cloudy, with a low around 60. South southeast wind around 5 mph, with gusts as high as 10 mph.
Tuesday
Partly sunny, with a high near 84. South wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. South wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 79.
Friday Night
A chance of showers. Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 62.
Sunday
A chance of showers. Partly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mc Cullom Lake IL
 42.36°N 88.29°W
Last Update:
4:16 pm CDT Sep 6, 2026
Forecast Valid:
5pm CDT Sep 6, 2026-6pm CDT Sep 13, 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