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.

Fog/Mist

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.83 in (1009.1 mb)
Dewpoint 72°F (22°C)
Visibility 2.00 mi
Last update 12 Aug 7:51 am CDT
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

  • Today

    Today: A slight chance of showers and thunderstorms between 11am and 3pm. Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. Northeast wind around 5 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph.

    Low: 65 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 76. East northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 79.

    High: 79 °F

    Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 11am and 3pm. Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 66. Northeast wind around 5 mph.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 76. East northeast wind around 10 mph, with gusts as high as 20 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68.
Sunday
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 79.
Sunday Night
Mostly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chicago / Waukegan, Waukegan Regional Airport IL
 42.43°N 87.87°W
Last Update:
6:46 am CDT Aug 12, 2026
Forecast Valid:
7am CDT Aug 12, 2026-6pm CDT Aug 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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