Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

95°F

35°C

Humidity 47%
Wind Speed S 3 mph
Barometer 30.03 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 18 Aug 2:45 pm CDT
Extended Forecast for

5 Miles NW Goreville IL

Heat Advisory August 18, 02:50pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 02:50pm until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 76. Calm wind.

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 4pm.  Sunny, with a high near 96. Heat index values as high as 108. Light and variable wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73. Light and variable wind.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 89. North wind 3 to 7 mph.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

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

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. North northeast wind around 7 mph.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69. North northeast wind around 6 mph becoming calm  in the evening.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind.
Tonight
Clear, with a low around 76. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, with a high near 96. Heat index values as high as 108. Light and variable wind.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Light and variable wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. North wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind around 6 mph.
Thursday
Mostly sunny, with a high near 88. North northeast wind around 7 mph.
Thursday Night
Mostly clear, with a low around 69. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. Light north northeast wind.
Friday Night
Mostly clear, with a low around 68. Calm wind.
Saturday
Sunny, with a high near 90. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. North wind 3 to 5 mph.
Sunday
Sunny, with a high near 83. North wind 5 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Goreville IL
 37.6°N 89.04°W
2:30 pm CDT Aug 18, 2025
2pm CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
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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