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.

Fair

N/A

Humidity NA
Wind Speed Calm
Barometer 29.98 in
Dewpoint N/A
Visibility 10.00 mi
Last update 19 Aug 7:35 pm CDT
Extended Forecast for

Carterville IL

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before 10pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 72. Light north wind.

    Low: 72 °F

    Heavy Rain
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 89. North northeast wind 6 to 10 mph.

    High: 89 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. North northeast wind 5 to 8 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 87. North northeast wind 6 to 9 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming north northeast around 6 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. North northeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly before 10pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 72. Light north wind.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 89. North northeast wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 66. North northeast wind 5 to 8 mph.
Thursday
Mostly sunny, with a high near 87. North northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 66. North northeast wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 89. Calm wind becoming north northeast around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 65. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 85. Light north northwest wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 58. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the morning.
Monday Night
Partly cloudy, with a low around 56. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 81. Calm wind becoming north northwest around 5 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:
7:16 pm CDT Aug 19, 2025
Forecast Valid:
7pm CDT Aug 19, 2025-6pm CDT Aug 26, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation