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.

Overcast

64°F

18°C

Humidity 81%
Wind Speed NE 6 mph
Barometer 29.95 in (1013.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 28 Jun 12:51 am CDT
Extended Forecast for

Waukegan IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 61. Northeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 61 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 73. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. South southeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 93. Heat index values as high as 103. South wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 95.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Wednesday Night

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

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 61. Northeast wind around 5 mph, with gusts as high as 10 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 73. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 68. South southeast wind around 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 103. South wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Sunny and hot, with a high near 95.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 96.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
A chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.85°W
Last Update:
1:20 am CDT Jun 28, 2026
Forecast Valid:
2am CDT Jun 28, 2026-6pm CDT Jul 4, 2026
 
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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