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

24°C

76°F

Humidity 74%
Wind Speed W 7 km/h
Barometer 1012.3 mb (29.93 in)
Dewpoint 19°C (67°F)
Visibility 16 km
Heat Index25°C (77°F)
Last update 12 Jul 10:51 pm CDT
Extended Forecast for

Waukegan IL

  • Tonight

    Tonight: Mostly clear, with a low around 18. West wind around 10 km/h.

    Low: 18 °C

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 28. West wind around 10 km/h.

    High: 28 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 19. Southwest wind 5 to 10 km/h.

    Low: 19 °C

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 31. Southwest wind 10 to 15 km/h, with gusts as high as 25 km/h.

    High: 31 °C

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 21. South southwest wind 5 to 10 km/h.

    Low: 21 °C

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 29.

    High: 29 °C

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °C

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 28.

    High: 28 °C

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 20.

    Low: 20 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 18. West wind around 10 km/h.
Sunday
Mostly sunny, with a high near 28. West wind around 10 km/h.
Sunday Night
Mostly clear, with a low around 19. Southwest wind 5 to 10 km/h.
Monday
Sunny, with a high near 31. Southwest wind 10 to 15 km/h, with gusts as high as 25 km/h.
Monday Night
Mostly clear, with a low around 21. South southwest wind 5 to 10 km/h.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 29.
Tuesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 22. Chance of precipitation is 30%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 28.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 20.
Thursday
A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 26.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 24.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.88°W
Last Update:
7:41 pm CDT Jul 12, 2025
Forecast Valid:
11pm CDT Jul 12, 2025-6pm CDT Jul 19, 2025
 
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