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

38°F

3°C

Humidity 68%
Wind Speed NW 9 mph
Barometer 30.25 in (1024.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 23 Dec 10:51 pm CST
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. North wind around 5 mph becoming east northeast after midnight.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of drizzle between 3pm and 5pm, then a chance of rain or drizzle after 5pm. Patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 41. East wind 5 to 15 mph becoming south southeast in the afternoon. Chance of precipitation is 30%.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain or drizzle likely before midnight, then a slight chance of drizzle after midnight. Patchy fog. Otherwise, cloudy, with a low around 35. Light and variable wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

  • Christmas Day

    Christmas Day: Cloudy, with a high near 39. North wind around 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 39 °F

    Cloudy

  • Thursday Night

    Thursday Night: Rain, mainly after midnight. Low around 36. Southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.

    Low: 36 °F

    Slight Chance
    Rain then
    Rain

  • Friday

    Friday: A 50 percent chance of rain before noon. Cloudy, with a high near 46.

    High: 46 °F

    Chance Rain
    then Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 37.

    Low: 37 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 46.

    High: 46 °F

    Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. North wind around 5 mph becoming east northeast after midnight.
Wednesday
A slight chance of drizzle between 3pm and 5pm, then a chance of rain or drizzle after 5pm. Patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 41. East wind 5 to 15 mph becoming south southeast in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Rain or drizzle likely before midnight, then a slight chance of drizzle after midnight. Patchy fog. Otherwise, cloudy, with a low around 35. Light and variable wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Christmas Day
Cloudy, with a high near 39. North wind around 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Rain, mainly after midnight. Low around 36. Southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.
Friday
A 50 percent chance of rain before noon. Cloudy, with a high near 46.
Friday Night
Cloudy, with a low around 37.
Saturday
Cloudy, with a high near 46.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 34. Breezy.
Sunday Night
Partly cloudy, with a low around 10. Blustery.
Monday
Sunny, with a high near 22. Blustery.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Partly sunny, with a high near 28.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chicago / Waukegan, Waukegan Regional Airport IL
 42.43°N 87.87°W
Last Update:
7:51 pm CST Dec 23, 2025
Forecast Valid:
11pm CST Dec 23, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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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