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

59°F

15°C

Humidity 54%
Wind Speed S 10 mph
Barometer 29.73 in (1006.9 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 21 Mar 2:51 pm CDT
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 72. South southwest wind around 15 mph, with gusts as high as 30 mph.

    High: 72 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 40. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 25 mph.

    Low: 40 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: A 20 percent chance of showers before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a temperature falling to around 38 by 4pm. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 41 °F⇓

    Slight Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 28. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 42. North wind around 5 mph becoming east northeast in the afternoon. Winds could gust as high as 10 mph.

    High: 42 °F

    Sunny

  • Monday Night

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

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 72. South southwest wind around 15 mph, with gusts as high as 30 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 40. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 25 mph.
Sunday
A 20 percent chance of showers before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a temperature falling to around 38 by 4pm. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 28. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 42. North wind around 5 mph becoming east northeast in the afternoon. Winds could gust as high as 10 mph.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Mostly cloudy, with a high near 57.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 42.
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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:
3:06 pm CDT Mar 21, 2026
Forecast Valid:
3pm CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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Chance of Precipitation