National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Partly Cloudy

86°F

30°C

Humidity 43%
Wind Speed S 6 mph
Barometer 29.94 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 20 Jun 4:45 pm CDT
Extended Forecast for

3 Miles S Buncombe IL

  • Tonight

    Tonight: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before noon, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 87. Light south southeast wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 2am, then showers and possibly a thunderstorm, mainly after 2am. Low around 71. South southwest wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 71 °F

    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West southwest wind around 8 mph becoming northwest in the afternoon. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 63. North wind 5 to 7 mph becoming calm in the evening.

    Low: 63 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Light north northeast wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 65. Calm wind.
Sunday
Showers and thunderstorms likely, mainly before noon, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 87. Light south southeast wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms before 2am, then showers and possibly a thunderstorm, mainly after 2am. Low around 71. South southwest wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West southwest wind around 8 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
Monday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 63. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Light north northeast wind.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 63. Calm wind.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 64. Calm wind.
Thursday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 64. Calm wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Light and variable wind.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Calm wind becoming south southwest 5 to 8 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Buncombe IL
 37.42°N 88.97°W
Last Update:
4:31 pm CDT Jun 20, 2026
Forecast Valid:
5pm CDT Jun 20, 2026-6pm CDT Jun 27, 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