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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

75°F

24°C

Humidity 98%
Wind Speed S 6 mph
Barometer 29.97 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 29 Jun 4:35 am CDT
Extended Forecast for

Whiteash IL

Extreme Heat Warning June 29, 11:00am until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Today

    Today: Sunny, with a high near 96. Heat index values as high as 108. South southwest wind 5 to 13 mph, with gusts as high as 18 mph.

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 3 to 8 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Heat index values as high as 107. Light south southwest wind increasing to 5 to 9 mph in the morning.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South wind around 6 mph becoming calm in the evening.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. Light and variable wind.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 97 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 96. Heat index values as high as 108. South southwest wind 5 to 13 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 75. South wind 3 to 8 mph.
Tuesday
Sunny, with a high near 96. Heat index values as high as 107. Light south southwest wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Clear, with a low around 74. South wind around 6 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 99. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 99. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 77. Light and variable wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Calm wind becoming south southwest around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 77. Light and variable wind.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 96. Light and variable wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 76. Calm wind.
Sunday
A chance of showers and thunderstorms. Sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.8°N 88.92°W
Last Update:
1:21 am CDT Jun 29, 2026
Forecast Valid:
4am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation