Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Current conditions at

Chicago, Chicago-O'Hare International Airport (KORD)

Lat: 41.98°NLon: 87.9°WElev: 666ft.

Fog/Mist

80°F

27°C

Humidity 90%
Wind Speed S 8 mph
Barometer 29.84 in (1009.8 mb)
Dewpoint 77°F (25°C)
Visibility 3.00 mi
Heat Index86°F (30°C)
Last update 27 Jul 7:51 am CDT
Extended Forecast for

Downers Grove IL

Heat Advisory July 27, 08:23am until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 27, 08:23am until July 27, 09:00pm

    NOW until 9:00pm Mon

    Heat Advisory

  • Today

    High: 91 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 9pm and 10pm.  Mostly cloudy, with a low around 70. West southwest wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.

    Low: 70 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. North northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. North northeast wind 5 to 15 mph.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. North northeast wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

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

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after noon. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 91. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 9pm and 10pm. Mostly cloudy, with a low around 70. West southwest wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.
Tuesday
Mostly sunny, with a high near 80. North northeast wind around 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 64. North northeast wind 5 to 15 mph.
Wednesday
Sunny, with a high near 82. North northeast wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 83.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Downers Grove IL
 41.81°N 88.03°W
8:06 am CDT Jul 27, 2026
8am CDT Jul 27, 2026-6pm CDT Aug 2, 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