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.

Fair

46°F

8°C

Humidity 100%
Wind Speed Calm
Barometer 30.16 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 6 Oct 7:45 am CDT
Extended Forecast for

4 Miles SSW Carterville IL

  • Today

    Today: Sunny, with a high near 77. Light east southeast wind.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58. Light and variable wind.

    Low: 58 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Light northeast wind.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 1pm. Sunny, with a high near 82. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 82 °F

    Sunny then
    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 77. Light east southeast wind.
Tonight
Clear, with a low around 53. Calm wind.
Wednesday
Sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 58. Light and variable wind.
Thursday
Sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 54. Light northeast wind.
Friday
Sunny, with a high near 79. Calm wind becoming east southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 55. Calm wind.
Saturday
A slight chance of showers after 1pm. Sunny, with a high near 82. Calm wind becoming south southeast 5 to 7 mph in the morning.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 60. Light east southeast wind.
Sunday
A slight chance of showers. Mostly sunny, with a high near 74. Light and variable wind becoming north 5 to 7 mph in the morning.
Sunday Night
Partly cloudy, with a low around 60. Calm wind.
Columbus Day
Mostly sunny, with a high near 82. Calm wind becoming south southwest around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Carterville IL
 37.72°N 89.12°W
Last Update:
5:21 am CDT Oct 6, 2026
Forecast Valid:
8am CDT Oct 6, 2026-6pm CDT Oct 12, 2026
 
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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

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation