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

91°F

33°C

Humidity 59%
Wind Speed S 10 G 23 mph
Barometer 30.01 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 29 Jun 3:45 pm CDT
Extended Forecast for

2 Miles SSW Goreville IL

Extreme Heat Warning June 29, 04:14pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 04:14pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 3 to 7 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 109. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. Light south southwest wind.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 94. Heat index values as high as 109. South southwest wind around 9 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 75. South wind 3 to 7 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 109. Calm wind becoming south southwest 5 to 7 mph in the morning.
Tuesday Night
Clear, with a low around 74. Light south southwest wind.
Wednesday
Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. Calm wind.
Thursday
Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 75. Calm wind.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 92. Light south wind.
Friday Night
Mostly clear, with a low around 75. Calm wind.
Independence Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Light south southwest wind.
Saturday Night
Partly cloudy, with a low around 75. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light southwest wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Goreville IL
 37.54°N 88.99°W
Last Update:
3:06 pm CDT Jun 29, 2026
Forecast Valid:
4pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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