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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

70°F

21°C

Humidity 93%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 25 Jul 2:15 am CDT
Extended Forecast for

4 Miles NNE Goreville IL

Heat Advisory July 26, 11:00am until July 28, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: A chance of showers, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 84. Calm wind becoming south around 5 mph.

    High: 84 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 92. Light and variable wind.

    High: 92 °F

    Decreasing
    Clouds

  • Sunday Night

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

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. Southwest wind 3 to 8 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South southwest wind 6 to 9 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. West wind 5 to 9 mph becoming north northwest in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. Northeast wind 3 to 6 mph.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of showers, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 84. Calm wind becoming south around 5 mph.
Saturday Night
Partly cloudy, with a low around 72. Calm wind.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 92. Light and variable wind.
Sunday Night
Mostly clear, with a low around 74. Calm wind.
Monday
Sunny, with a high near 95. Southwest wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 78. South southwest wind 6 to 9 mph.
Tuesday
Sunny, with a high near 95. West wind 5 to 9 mph becoming north northwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around 71. Northeast wind 3 to 6 mph.
Wednesday
Sunny, with a high near 91. North northeast wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 70. Light northeast wind.
Thursday
Mostly sunny, with a high near 90. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 71. Calm wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming east southeast around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Goreville IL
 37.6°N 88.96°W
Last Update:
2:06 am CDT Jul 25, 2026
Forecast Valid:
2am CDT Jul 25, 2026-6pm CDT Jul 31, 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