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.

Fair

81°F

27°C

Humidity 76%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 17 Aug 11:15 pm CDT
Extended Forecast for

Buncombe IL

Heat Advisory August 17, 11:25pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 11:25pm until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Tonight

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 98. Heat index values as high as 111. Calm wind.

    High: 98 °F

    Hot

  • Monday Night

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

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 106. Calm wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 90. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. North wind 5 to 7 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Calm wind.
Monday
Sunny and hot, with a high near 98. Heat index values as high as 111. Calm wind.
Monday Night
Mostly clear, with a low around 74. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 106. Calm wind.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Calm wind.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 90. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 88. North wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 68. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 68. Calm wind.
Saturday
Sunny, with a high near 91. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65. Light north wind.
Sunday
Sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Buncombe IL
 37.47°N 88.93°W
Last Update:
10:30 pm CDT Aug 17, 2025
Forecast Valid:
11pm CDT Aug 17, 2025-6pm CDT Aug 24, 2025
 
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