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

Areas of Severe Thunderstorms and Heavy Rain Possible through the Weekend

There will be daily chances for scattered thunderstorms across portions of the Central and Eastern U.S. through the weekend, with severe thunderstorms possible in the northern Plains and Upper Midwest. Potential severe storm hazards may include large hail, damaging winds, and a few tornadoes. Storms could also produce heavy rain that may lead to isolated instances of flash flooding. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

69°F

21°C

Humidity 84%
Wind Speed Calm
Barometer 30.00 in (1015.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 28 Jun 11:51 pm CDT
Extended Forecast for

Waukegan IL

  • Overnight

    Overnight: Mostly clear, with a low around 68. South wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 91. Heat index values as high as 99. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 72. South wind 5 to 10 mph.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: Scattered showers and thunderstorms. Partly sunny, with a high near 83. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 50%.

    High: 83 °F

    Scattered
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. West northwest wind 5 to 10 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 68. South wind around 5 mph.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 91. Heat index values as high as 99. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 72. South wind 5 to 10 mph.
Monday
Scattered showers and thunderstorms. Partly sunny, with a high near 83. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 50%.
Monday Night
Mostly clear, with a low around 66. West northwest wind 5 to 10 mph.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 66.
Independence Day
Mostly sunny, with a high near 85.
Friday Night
A chance of showers. Partly cloudy, with a low around 72.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.88°W
Last Update:
11:56 pm CDT Jun 28, 2025
Forecast Valid:
12am CDT Jun 29, 2025-6pm CDT Jul 5, 2025
 
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