National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

93°F

34°C

Humidity 53%
Wind Speed W 7 mph
Barometer 29.95 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 19 Aug 2:45 pm CDT
Extended Forecast for

2 Miles W Whiteash IL

Heat Advisory August 19, 03:41pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 19, 03:41pm until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 98 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm.

    Low: 73 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90. North northeast wind 6 to 10 mph.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. North northeast wind 5 to 9 mph.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 87. North northeast wind 6 to 10 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. North northeast wind 5 to 8 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. North northeast wind 3 to 6 mph.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. North northeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 108. Northwest wind around 6 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm.
Wednesday
Mostly sunny, with a high near 90. North northeast wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 67. North northeast wind 5 to 9 mph.
Thursday
Mostly sunny, with a high near 87. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 66. North northeast wind 5 to 8 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. North northeast wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 65. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. North northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 58. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 82. Calm wind becoming north northwest 5 to 8 mph in the morning.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Whiteash IL
 37.78°N 88.97°W
Last Update:
2:45 pm CDT Aug 19, 2025
Forecast Valid:
3pm CDT Aug 19, 2025-6pm CDT Aug 25, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation