Severe Weather and Flooding Threats for the Central U.S.; Dangerous Heat in the Southern and Western U.S.

Severe weather and flooding threats will continue for portions of the central U.S. over the next couple of days, with multiple rounds of thunderstorms expected. Dangerous heat will persist across the southern and western U.S. through mid-week. Hot and dry conditions will fuel fire weather concerns for the Intermountain West, where dry thunderstorms may spark additional wildfires. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

51°F

11°C

Humidity 96%
Wind Speed Calm
Barometer 30.14 in (1020.4 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 24 Jun 12:51 am CDT
Extended Forecast for

Great Lakes IL

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 59. South wind around 5 mph, with gusts as high as 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 4pm, then scattered showers and thunderstorms after 4pm.  Mostly cloudy, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly before 10pm.  Mostly cloudy, with a low around 60. South southwest wind 5 to 10 mph becoming west after midnight.  Chance of precipitation is 50%.

    Low: 60 °F

    Scattered
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers between noon and 2pm.  Mostly sunny, with a high near 74. West wind 5 to 10 mph becoming north northeast in the afternoon.  Chance of precipitation is 20%.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 57. Northeast wind around 5 mph.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers before 1pm.  Partly sunny, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 59. South wind around 5 mph, with gusts as high as 10 mph.
Wednesday
A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 4pm, then scattered showers and thunderstorms after 4pm. Mostly cloudy, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 60. South southwest wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 50%.
Thursday
A slight chance of showers between noon and 2pm. Mostly sunny, with a high near 74. West wind 5 to 10 mph becoming north northeast in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 57. Northeast wind around 5 mph.
Friday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 58.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Partly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny and hot, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
Great Lakes IL
 42.3°N 87.85°W
1:21 am CDT Jun 24, 2026
1am CDT Jun 24, 2026-6pm CDT Jun 30, 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