Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

80°F

27°C

Humidity 71%
Wind Speed SW 17 G 33 mph
Barometer 29.83 in (1008.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 21 Jun 6:51 am CDT
Extended Forecast for

Chicago / Waukegan, Waukegan Regional Airport IL

Heat Advisory June 21, 10:00am until June 24, 12:00am
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny, with a high near 94. Heat index values as high as 103. Breezy, with a south southwest wind 15 to 25 mph, with gusts as high as 40 mph.

    High: 94 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 77. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 40 mph.

    Low: 77 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 95. Heat index values as high as 103. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 95 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 94. Heat index values as high as 103. Breezy, with a south southwest wind 15 to 25 mph, with gusts as high as 40 mph.
Tonight
Mostly clear, with a low around 77. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 40 mph.
Sunday
Sunny and hot, with a high near 95. Heat index values as high as 103. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
Sunny and hot, with a high near 97. Southwest wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 79.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Thursday
Showers and thunderstorms likely. Mostly sunny, with a high near 88.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 67.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Chicago / Waukegan, Waukegan Regional Airport IL
 42.43°N 87.87°W
3:56 am CDT Jun 21, 2025
7am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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Additional Resources

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Hourly Weather Forecast

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