National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

47°F

8°C

Humidity 71%
Wind Speed N 10 mph
Barometer 30.23 in (1024.0 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 21 May 8:51 pm CDT
Extended Forecast for

Waukegan IL

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 50. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 61. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Cloudy, with a low around 49. East northeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 10am. Mostly cloudy, with a high near 62. North northeast wind around 10 mph.

    High: 62 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 51. North northeast wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 50. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 61. East northeast wind around 15 mph, with gusts as high as 25 mph.
Friday Night
A 20 percent chance of showers after 1am. Cloudy, with a low around 49. East northeast wind around 15 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of showers, mainly before 10am. Mostly cloudy, with a high near 62. North northeast wind around 10 mph.
Saturday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 51. North northeast wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 54.
Memorial Day
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
A chance of showers. Partly sunny, with a high near 70.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.88°W
Last Update:
4:06 pm CDT May 21, 2026
Forecast Valid:
9pm CDT May 21, 2026-6pm CDT May 28, 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