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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

90°F

32°C

Humidity 55%
Wind Speed S 10 mph
Barometer 29.98 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 12 Aug 12:45 pm CDT
Extended Forecast for

Carterville IL

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 93. South wind around 6 mph. Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 71. Light and variable wind.

    Low: 71 °F

    Chance
    T-storms and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97. Calm wind becoming south southwest around 5 mph.

    High: 97 °F

    Hot

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 93. South wind around 6 mph. Chance of precipitation is 20%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 71. Light and variable wind.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 40%.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.
Thursday Night
Partly cloudy, with a low around 71. Calm wind.
Friday
Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph.
Friday Night
Mostly clear, with a low around 74. Calm wind.
Saturday
Sunny and hot, with a high near 97. Calm wind becoming south southwest around 5 mph.
Saturday Night
Mostly clear, with a low around 76. Calm wind.
Sunday
Sunny and hot, with a high near 99. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 74. Light and variable wind.
Monday
Mostly sunny and hot, with a high near 97. Calm wind becoming south around 5 mph in the afternoon.
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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:
12:01 pm CDT Aug 12, 2025
Forecast Valid:
1pm CDT Aug 12, 2025-6pm CDT Aug 18, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation