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.

Mostly Cloudy

79°F

26°C

Humidity 58%
Wind Speed NE 8 mph
Barometer 30.05 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 22 Aug 1:45 pm CDT
Extended Forecast for

Carterville IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 82. Northeast wind 3 to 7 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming north around 6 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Light north northwest wind.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 82. North northwest wind 6 to 10 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 79. Calm wind becoming north northwest 5 to 8 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. North northwest wind around 6 mph becoming calm in the evening.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79. Calm wind becoming north northwest 5 to 7 mph in the morning.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 82. Northeast wind 3 to 7 mph.
Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming north around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 63. Light north northwest wind.
Sunday
Sunny, with a high near 82. North northwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 56. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 79. Calm wind becoming north northwest 5 to 8 mph in the morning.
Monday Night
Partly cloudy, with a low around 54. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79. Calm wind becoming north northwest 5 to 7 mph in the morning.
Tuesday Night
Clear, with a low around 53. North wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 81. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 56. Light and variable wind.
Thursday
Mostly sunny, with a high near 82. Calm wind becoming south southwest 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:
1:45 pm CDT Aug 22, 2025
Forecast Valid:
2pm CDT Aug 22, 2025-6pm CDT Aug 28, 2025
 
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