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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

N/A

Humidity NA
Wind Speed Calm
Barometer 30.02 in
Dewpoint N/A
Visibility 10.00 mi
Last update 19 Aug 2:35 am CDT
Extended Forecast for

Goreville IL

Heat Advisory August 19, 02:41am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 19, 02:41am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Overnight

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 96. Heat index values as high as 105. Southwest wind around 6 mph becoming calm in the afternoon.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 88. North wind 6 to 9 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. North northeast wind around 7 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 86. North northeast wind 6 to 9 mph.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. North northeast wind around 6 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. North northeast wind 3 to 6 mph.

    High: 90 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 76. Light south wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 96. Heat index values as high as 105. Southwest wind around 6 mph becoming calm in the afternoon.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 88. North wind 6 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67. North northeast wind around 7 mph.
Thursday
Mostly sunny, with a high near 86. North northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 66. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. North northeast wind 3 to 6 mph.
Friday Night
Clear, with a low around 66. Light north northeast wind.
Saturday
Sunny, with a high near 90. Calm wind becoming north around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. North northwest wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 59. North wind 3 to 6 mph.
Monday
Sunny, with a high near 80. Calm wind becoming north around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Goreville IL
 37.58°N 88.96°W
Last Update:
1:45 am CDT Aug 19, 2025
Forecast Valid:
2am CDT Aug 19, 2025-6pm CDT Aug 25, 2025
 
Forecast Discussion
 
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Additional Resources

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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