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.

Overcast

70°F

21°C

Humidity 96%
Wind Speed S 7 mph
Barometer 29.89 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 14 Jun 2:35 am CDT
Extended Forecast for

Carterville IL

  • Overnight

    Overnight: A 20 percent chance of showers. Mostly cloudy, with a low around 69. Light south wind.

    Low: 69 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after 9am. Mostly cloudy, with a high near 82. South southwest wind 5 to 7 mph becoming north northwest in the afternoon.

    High: 82 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 68 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 84. North wind 3 to 5 mph.

    High: 84 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Light south wind. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. Light south wind.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. South southwest wind 5 to 8 mph.

    High: 86 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 6 to 8 mph.

    Low: 73 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 69. Light south wind.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after 9am. Mostly cloudy, with a high near 82. South southwest wind 5 to 7 mph becoming north northwest in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. North northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 84. North wind 3 to 5 mph.
Sunday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. Calm wind.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Light south wind. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. Light south wind.
Tuesday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. South southwest wind 5 to 8 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 6 to 8 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Juneteenth
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. West wind around 7 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 70. Light and variable wind.
Friday
A slight chance of showers. Mostly sunny, with a high near 89. Calm wind becoming southwest around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carterville IL
 37.76°N 89.09°W
Last Update:
2:00 am CDT Jun 14, 2025
Forecast Valid:
2am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
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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