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

97°F

36°C

Humidity 42%
Wind Speed S 6 mph
Barometer 30.02 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 1 Sep 3:45 pm CDT
Extended Forecast for

2 Miles SSW Goreville IL

Extreme Heat Warning until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 97 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 75. Calm wind.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 75. Calm wind.

    Low: 75 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 98. Light south southwest wind.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 97. South southwest wind around 5 mph.
Tonight
Clear, with a low around 75. Calm wind.
Wednesday
Sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 75. Calm wind.
Thursday
Sunny and hot, with a high near 97. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 74. Calm wind.
Friday
Sunny and hot, with a high near 98. Light south southwest wind.
Friday Night
Mostly clear, with a low around 74. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Light west wind.
Saturday Night
Partly cloudy, with a low around 72. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 70. Calm wind.
Labor Day
Sunny, with a high near 92. Calm wind becoming east southeast around 5 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Goreville IL
 37.54°N 88.99°W
Last Update:
1:26 pm CDT Sep 1, 2026
Forecast Valid:
4pm CDT Sep 1, 2026-6pm CDT Sep 7, 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