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

55°F

13°C

Humidity 36%
Wind Speed NW 5 mph
Barometer 29.89 in (1012.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 15 Feb 4:51 pm CST
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Light and variable wind becoming south southwest 5 to 10 mph after midnight.

    Low: 34 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 61. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Partly Sunny

  • Monday Night

    Monday Night: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 36. West wind around 5 mph becoming east after midnight.

    Low: 36 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 44. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 44 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 43. Southeast wind 10 to 15 mph becoming south southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers before noon. Mostly sunny, with a high near 61.

    High: 61 °F

    Chance
    Showers then
    Sunny

  • Wednesday Night

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

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 34. Light and variable wind becoming south southwest 5 to 10 mph after midnight.
Washington's Birthday
Partly sunny, with a high near 61. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 36. West wind around 5 mph becoming east after midnight.
Tuesday
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 44. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers likely, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 43. Southeast wind 10 to 15 mph becoming south southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of showers before noon. Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Partly sunny, with a high near 49.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 33.
Friday
A chance of rain before noon. Mostly sunny, with a high near 40.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chicago / Waukegan, Waukegan Regional Airport IL
 42.41°N 87.87°W
Last Update:
3:11 pm CST Feb 15, 2026
Forecast Valid:
5pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation