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.

Light Snow

32°F

0°C

Humidity 76%
Wind Speed W 10 G 21 mph
Barometer 29.73 in
Dewpoint 25°F (-4°C)
Visibility 7.00 mi
Wind Chill24°F (-4°C)
Last update 16 Mar 4:15 am CDT
Extended Forecast for

Carterville IL

Wind Advisory March 16, 04:28am until March 16, 07:00am
Click here for hazard details and duration
...
  •  
    Wind Advisory March 16, 04:28am until March 16, 07:00am

    NOW until 7:00am Mon

    Wind Advisory

  • Today

    High: 35 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 17. West northwest wind 10 to 17 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 38. Northwest wind 6 to 9 mph.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 8 to 13 mph in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. South southwest wind around 7 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 71. South southwest wind 6 to 8 mph.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46. West southwest wind around 6 mph becoming light and variable after midnight.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Today
Mostly cloudy, with a high near 35. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 33 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 17. West northwest wind 10 to 17 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 38. Northwest wind 6 to 9 mph.
Tuesday Night
A 30 percent chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 8 to 13 mph in the evening. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 61. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 43. South southwest wind around 7 mph.
Thursday
Sunny, with a high near 71. South southwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 46. West southwest wind around 6 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 73. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 53. Southwest wind around 7 mph.
Saturday
Sunny, with a high near 78. West wind 7 to 9 mph.
Saturday Night
Mostly clear, with a low around 51. West wind around 8 mph becoming south southwest after midnight.
Sunday
Sunny, with a high near 73. South wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carterville IL
 37.78°N 89.09°W
Last Update:
3:22 am CDT Mar 16, 2026
Forecast Valid:
4am CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
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