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

36°F

2°C

Humidity 93%
Wind Speed Calm
Barometer 29.95 in (1014.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 21 Mar 1:51 am CDT
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 36. East wind around 5 mph.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. East wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 39. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 39 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: A 40 percent chance of rain, mainly before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a high near 39. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 39 °F

    Chance Rain
    and Patchy
    Fog

  • Sunday Night

    Sunday Night: A 10 percent chance of rain before 7pm. Mostly cloudy, with a low around 28. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Monday Night

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

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 36. East wind around 5 mph.
Saturday
Mostly sunny, with a high near 73. East wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Patchy fog after 4am. Otherwise, increasing clouds, with a low around 39. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Sunday
A 40 percent chance of rain, mainly before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a high near 39. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 10 percent chance of rain before 7pm. 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 40.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
A chance of showers. Mostly cloudy, with a high near 57.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 41.
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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:
1:11 am CDT Mar 21, 2026
Forecast Valid:
2am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation