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.

Light Rain

67°F

19°C

Humidity 91%
Wind Speed NW 5 mph
Barometer 29.72 in (1005.3 mb)
Dewpoint 64°F (18°C)
Visibility 8.00 mi
Last update 18 Jun 10:51 pm CDT
Extended Forecast for

Great Lakes IL

  • Tonight

    Tonight: Showers likely, mainly before midnight. Cloudy, with a low around 62. West northwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 62 °F

    Showers
    Likely

  • Juneteenth

    Juneteenth: A 30 percent chance of showers, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 81. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 81 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 72. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely, mainly before midnight. Cloudy, with a low around 62. West northwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Juneteenth
A 30 percent chance of showers, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 81. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Mostly clear, with a low around 65. Southwest wind around 5 mph, with gusts as high as 10 mph.
Friday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 72. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 93.
Saturday Night
Clear, with a low around 75.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
A chance of showers. Mostly sunny, with a high near 87.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
Showers likely. Partly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Lakes IL
 42.3°N 87.85°W
Last Update:
8:56 pm CDT Jun 18, 2025
Forecast Valid:
11pm CDT Jun 18, 2025-6pm CDT Jun 25, 2025
 
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