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.

Mostly Cloudy

57°F

14°C

Humidity 74%
Wind Speed NW 6 mph
Barometer 30.13 in (1019.7 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 19 May 11:51 pm CDT
Extended Forecast for

Waukegan IL

  • Overnight

    Overnight: Partly cloudy, with a low around 49. North northwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 52. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 52 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. Northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 57.

    High: 57 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 49. North northwest wind around 10 mph, with gusts as high as 15 mph.
Wednesday
Mostly sunny, with a high near 52. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 44. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 56. Northeast wind around 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 46. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 57.
Friday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 48. Chance of precipitation is 80%.
Saturday
Mostly cloudy, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 53.
Memorial Day
Mostly sunny, with a high near 70.
Monday Night
Mostly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.88°W
Last Update:
12:17 am CDT May 20, 2026
Forecast Valid:
12am CDT May 20, 2026-6pm CDT May 26, 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