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

43°F

6°C

Humidity 53%
Wind Speed SW 13 mph
Barometer 30.28 in (1026.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 28 Mar 10:51 pm CDT
Extended Forecast for

Waukegan IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 61. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Wednesday Night

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

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 61. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 47. South southwest wind around 10 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 73. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Tuesday Night
A 50 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
A chance of rain and snow showers. Partly sunny, with a high near 40.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 35.
Friday
Mostly cloudy, with a high near 48.
Friday Night
A chance of showers. Mostly cloudy, with a low around 41.
Saturday
A chance of showers. Mostly cloudy, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.85°W
Last Update:
8:06 pm CDT Mar 28, 2026
Forecast Valid:
11pm CDT Mar 28, 2026-6pm CDT Apr 4, 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