Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

75°F

24°C

Humidity 96%
Wind Speed S 6 mph
Barometer 30.00 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Last update 19 Jul 11:55 pm CDT
Extended Forecast for

Whiteash IL

Heat Advisory July 20, 12:00pm until July 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Partly cloudy, with a low around 76. Southwest wind around 6 mph.

    Low: 76 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind 6 to 10 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 77. South southwest wind around 6 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 93. West wind around 6 mph.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 76. South wind around 5 mph becoming calm  in the evening.

    Low: 76 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 95. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Light southeast wind.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 96. Calm wind becoming south around 6 mph in the afternoon.

    High: 96 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Light southeast wind.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. Southwest wind around 6 mph.
Sunday
Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind 6 to 10 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 77. South southwest wind around 6 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. West wind around 6 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 95. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 77. Light southeast wind.
Wednesday
Mostly sunny, with a high near 96. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 77. Light southeast wind.
Thursday
Mostly sunny, with a high near 96. South wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 78. South wind 3 to 6 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 95. South southwest wind 3 to 7 mph.
Friday Night
Partly cloudy, with a low around 77. South wind around 6 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.78°N 88.92°W
11:31 pm CDT Jul 19, 2025
11pm CDT Jul 19, 2025-6pm CDT Jul 26, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database