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.

Mostly Cloudy

55°F

13°C

Humidity 36%
Wind Speed SE 6 mph
Barometer 30.01 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 17 Nov 6:47 pm CST
Extended Forecast for

Carterville IL

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a steady temperature around 54. South southeast wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 71. Southwest wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight. Increasing clouds, with a low around 49. West southwest wind around 6 mph becoming calm in the evening.

    Low: 49 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after noon. High near 66. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 90%.

    High: 66 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 57. South southwest wind 5 to 7 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67. South wind 7 to 11 mph.

    High: 67 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 46. Southeast wind 6 to 8 mph becoming north northwest after midnight.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a steady temperature around 54. South southeast wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday
Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 71. Southwest wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
A 30 percent chance of showers before midnight. Increasing clouds, with a low around 49. West southwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, with a high near 64. North northwest wind around 5 mph becoming calm in the afternoon.
Wednesday Night
A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 49. Calm wind.
Thursday
Showers, with thunderstorms also possible after noon. High near 66. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm. Low around 57. South southwest wind 5 to 7 mph. Chance of precipitation is 90%.
Friday
Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67. South wind 7 to 11 mph.
Friday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 46. Southeast wind 6 to 8 mph becoming north northwest after midnight.
Saturday
Mostly sunny, with a high near 58. Northwest wind 3 to 8 mph.
Saturday Night
Partly cloudy, with a low around 41. Calm wind.
Sunday
Mostly sunny, with a high near 60. Calm wind becoming west southwest around 6 mph.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 42. Light south southwest wind.
Monday
A slight chance of showers. Partly sunny, with a high near 60. South southwest wind 3 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carterville IL
 37.76°N 89.09°W
Last Update:
3:16 pm CST Nov 17, 2025
Forecast Valid:
7pm CST Nov 17, 2025-6pm CST Nov 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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