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.

A Few Clouds

63°F

17°C

Humidity 56%
Wind Speed SW 16 mph
Barometer 30.09 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 5 Nov 9:45 am CST
Extended Forecast for

Carterville IL

  • Today

    Today: Sunny, with a high near 72. Southwest wind 9 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 40. North northwest wind around 6 mph becoming light and variable in the evening.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Light east wind becoming southeast 5 to 9 mph in the morning.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 52. Southeast wind 6 to 11 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.

    Low: 52 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers likely before 9am, then showers likely and possibly a thunderstorm between 9am and noon, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72. West wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. West wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers, mainly before midnight. Partly cloudy, with a low around 38. West southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 18 mph.

    Low: 38 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 47. Northwest wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 72. Southwest wind 9 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Tonight
Clear, with a low around 40. North northwest wind around 6 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 65. Light east wind becoming southeast 5 to 9 mph in the morning.
Thursday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 52. Southeast wind 6 to 11 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.
Friday
Showers likely before 9am, then showers likely and possibly a thunderstorm between 9am and noon, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72. West wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Friday Night
Mostly clear, with a low around 44. West wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 67. Calm wind becoming southwest 5 to 9 mph in the morning.
Saturday Night
A chance of showers, mainly before midnight. Partly cloudy, with a low around 38. West southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly sunny, with a high near 47. Northwest wind 11 to 16 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 25. Northwest wind 7 to 10 mph.
Monday
Sunny, with a high near 44. Northwest wind 7 to 11 mph.
Monday Night
Mostly clear, with a low around 26. West southwest wind 3 to 5 mph.
Veterans Day
Sunny, with a high near 52. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carterville IL
 37.76°N 89.09°W
Last Update:
7:52 am CST Nov 5, 2025
Forecast Valid:
9am CST Nov 5, 2025-6pm CST Nov 11, 2025
 
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Additional Resources

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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