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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Carterville IL

  • Overnight

    Overnight: Mostly clear, with a low around 24. Southwest wind 3 to 6 mph.

    Low: 24 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 50. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the morning. Winds could gust as high as 28 mph.

    High: 50 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37. Southwest wind 6 to 15 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63. West northwest wind 3 to 8 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 63. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 63 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind around 6 mph.

    Low: 48 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 72. South wind 6 to 10 mph.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. South wind around 8 mph.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 24. Southwest wind 3 to 6 mph.
Veterans Day
Partly sunny, with a high near 50. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the morning. Winds could gust as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 37. Southwest wind 6 to 15 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 63. West northwest wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 37. Calm wind.
Thursday
Partly sunny, with a high near 63. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind around 6 mph.
Friday
Mostly sunny, with a high near 72. South wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 56. South wind around 8 mph.
Saturday
Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday Night
A chance of showers. Partly cloudy, with a low around 55. Southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 70. West wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
A chance of showers. Partly cloudy, with a low around 47. West wind 6 to 8 mph.
Monday
A chance of showers. Partly sunny, with a high near 59. South southeast wind 7 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carterville IL
 37.78°N 89.09°W
Last Update:
12:26 am CST Nov 11, 2025
Forecast Valid:
1am CST Nov 11, 2025-6pm CST Nov 17, 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