Heat Expands for Center of the Nation; Severe Thunderstorms for Plains and Upper Midwest

Dangerous heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest. Critical fire weather for portions of the Intermountain West. Risk for severe thunderstorms and flash flooding across the Upper Midwest/Great Lakes, Ohio Valley, and portions of the mid-Atlantic. Active monsoonal moisture fuels thunderstorms over the Southwest. Hurricane Fausto in the Pacific, should weaken Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

81°F

27°C

Humidity 79%
Wind Speed W 8 mph
Barometer 29.91 in (1011.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 26 Jul 9:51 am CDT
Extended Forecast for

Waukegan IL

  • Today

    Today: Mostly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 5 to 10 mph becoming south southeast in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 74. South wind around 5 mph, with gusts as high as 10 mph.

    Low: 74 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 70. West wind around 10 mph becoming north after midnight. Winds could gust as high as 15 mph.

    Low: 70 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 88. Heat index values as high as 95. Southwest wind 5 to 10 mph becoming south southeast in the afternoon.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 74. South wind around 5 mph, with gusts as high as 10 mph.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. West wind around 10 mph becoming north after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly sunny, with a high near 78. North northeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A chance of showers after 1am. Mostly cloudy, with a low around 66.
Friday
A chance of showers. Partly sunny, with a high near 83.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.85°W
8:16 am CDT Jul 26, 2026
10am CDT Jul 26, 2026-6pm CDT Aug 1, 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