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.

Overcast

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 20 Aug 7:45 am CDT
Extended Forecast for

4 Miles SW Buncombe IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.

    High: 86 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

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

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83. Light east southeast wind.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 67. Calm wind.
Friday
Sunny, with a high near 87. Calm wind.
Friday Night
Mostly clear, with a low around 67. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65. Calm wind.
Sunday
Sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 62. Calm wind.
Monday
Mostly sunny, with a high near 83. Light east southeast wind.
Monday Night
A slight chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 64. Calm wind.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Light southeast wind.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65. Calm wind.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Light and variable wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Buncombe IL
 37.45°N 89.02°W
Last Update:
5:36 am CDT Aug 20, 2026
Forecast Valid:
8am CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation