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

79°F

26°C

Humidity 34%
Wind Speed SE 9 mph
Barometer 30.11 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 8 Oct 10:47 am CDT
Extended Forecast for

4 Miles SSW Carterville IL

  • Today

    Today: Sunny, with a high near 84. East wind 3 to 5 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 57. Calm wind.

    Low: 57 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south southeast around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. Light southeast wind.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: A 50 percent chance of showers after 1pm. Partly sunny, with a high near 78. South southeast wind 3 to 8 mph.

    High: 78 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 60. East wind 9 to 11 mph. Chance of precipitation is 90%.

    Low: 60 °F

    Showers

  • Sunday

    Sunday: A 50 percent chance of showers before 1pm. Partly sunny, with a high near 72. East northeast wind around 8 mph becoming northwest in the afternoon.

    High: 72 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 84. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 84. East wind 3 to 5 mph.
Tonight
Clear, with a low around 57. Calm wind.
Friday
Sunny, with a high near 86. Calm wind becoming south southeast around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 62. Light southeast wind.
Saturday
A 50 percent chance of showers after 1pm. Partly sunny, with a high near 78. South southeast wind 3 to 8 mph.
Saturday Night
Showers. Low around 60. East wind 9 to 11 mph. Chance of precipitation is 90%.
Sunday
A 50 percent chance of showers before 1pm. Partly sunny, with a high near 72. East northeast wind around 8 mph becoming northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 59. Calm wind.
Columbus Day
Sunny, with a high near 84. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Monday Night
Mostly clear, with a low around 62. South southwest wind around 7 mph.
Tuesday
A slight chance of showers. Sunny, with a high near 78. Northwest wind 7 to 10 mph.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 54. North northeast wind 3 to 6 mph.
Wednesday
Sunny, with a high near 73. East wind 3 to 6 mph.
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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:
8:56 am CDT Oct 8, 2026
Forecast Valid:
11am CDT Oct 8, 2026-6pm CDT Oct 14, 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