Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

57°F

14°C

Humidity 90%
Wind Speed Calm
Barometer 29.94 in (1013.2 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Jun 10:51 pm CDT
Extended Forecast for

Waukegan IL

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind around 5 mph becoming northwest after midnight.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers, mainly after 3pm.  High near 66. Northeast wind 5 to 10 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Partly Sunny
    then Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 1am.  Low around 56. East northeast wind around 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Showers

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 67. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. North wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 76.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

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

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. South wind around 5 mph becoming northwest after midnight.
Sunday
Showers, mainly after 3pm. High near 66. Northeast wind 5 to 10 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers, mainly before 1am. Low around 56. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 67. North northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 53. North wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.85°W
8:31 pm CDT Jun 20, 2026
11pm CDT Jun 20, 2026-6pm CDT Jun 27, 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