Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago / West Chicago, Dupage Airport (KDPA)

Lat: 41.9°NLon: 88.25°WElev: 758ft.

Thunderstorm

76°F

24°C

Humidity 88%
Wind Speed S 8 mph
Barometer 29.66 in (1003.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 27 Jul 8:52 pm CDT
Extended Forecast for

Saint Charles IL

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm.  Partly cloudy, with a low around 68. West wind around 10 mph becoming north after midnight. Winds could gust 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.

    Low: 68 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. North northeast wind 10 to 15 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. North wind around 5 mph, with gusts as high as 10 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers after 1pm.  Mostly cloudy, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 11pm. Partly cloudy, with a low around 68. West wind around 10 mph becoming north after midnight. Winds could gust 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.
Tuesday
Mostly sunny, with a high near 83. North northeast wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 61. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 85. North wind around 5 mph, with gusts as high as 10 mph.
Wednesday Night
Mostly clear, with a low around 64. North northeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A chance of showers 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, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles IL
 41.9°N 88.32°W
9:06 pm CDT Jul 27, 2026
9pm CDT Jul 27, 2026-6pm CDT Aug 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

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