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.

Partly Cloudy

32°F

0°C

Humidity 80%
Wind Speed SE 10 mph
Barometer 30.06 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 3 Feb 6:45 am CST
Extended Forecast for

Carterville IL

  • Today

    Today: A chance of drizzle, snow, and freezing rain before 1pm, then a slight chance of drizzle between 1pm and 2pm. Mostly cloudy, with a high near 37. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 37 °F

    Chance Wintry
    Mix

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. North wind 7 to 9 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 6 to 9 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14. North wind around 6 mph becoming calm in the evening.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 36. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 36 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29. South southwest wind around 8 mph.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. North northwest wind around 6 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 43. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 43 °F

    Sunny

Detailed Forecast

Today
A chance of drizzle, snow, and freezing rain before 1pm, then a slight chance of drizzle between 1pm and 2pm. Mostly cloudy, with a high near 37. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.
Tonight
Mostly cloudy, with a low around 22. North wind 7 to 9 mph.
Wednesday
Partly sunny, with a high near 31. North wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 14. North wind around 6 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 36. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 29. South southwest wind around 8 mph.
Friday
Sunny, with a high near 50. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.
Friday Night
Mostly clear, with a low around 25. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 43. Light and variable wind becoming east around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 27. Southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 44. Northeast wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 26. Light east northeast wind.
Monday
Partly sunny, with a high near 43. Light and variable wind becoming east around 6 mph in the morning.
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:
6:46 am CST Feb 3, 2026
Forecast Valid:
7am CST Feb 3, 2026-6pm CST Feb 9, 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