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.

Partly Cloudy

73°F

23°C

Humidity 94%
Wind Speed SE 7 mph
Barometer 30.04 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 6:45 am CDT
Extended Forecast for

6 Miles ESE Cobden IL

Heat Advisory August 18, 07:21am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 07:21am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Today

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. Light east wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 106. Calm wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming north 5 to 7 mph in the morning.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89. North northeast wind around 7 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming southeast around 5 mph.
Tonight
Mostly clear, with a low around 74. Light east wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 106. Calm wind.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming north 5 to 7 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 89. North northeast wind around 7 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 68. Light north northeast wind.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 85. Calm wind becoming north northwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Cobden IL
 37.52°N 89.16°W
Last Update:
5:46 am CDT Aug 18, 2025
Forecast Valid:
7am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
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