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

76°F

24°C

Humidity 90%
Wind Speed S 10 mph
Barometer 30.00 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 21 Jun 3:15 am CDT
Extended Forecast for

4 Miles SSW Carterville IL

Heat Advisory June 21, 12:00pm until June 24, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 76. South wind around 8 mph, with gusts as high as 18 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93. South southwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 77. South wind 5 to 8 mph.

    Low: 77 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. South southwest wind 5 to 8 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 77. South wind 3 to 6 mph.

    Low: 77 °F

    Clear

  • Monday

    Monday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Sunny, with a high near 93. South wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Light south wind.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 76. South wind around 8 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 93. South southwest wind 9 to 13 mph, with gusts as high as 23 mph.
Saturday Night
Clear, with a low around 77. South wind 5 to 8 mph.
Sunday
Sunny, with a high near 94. South southwest wind 5 to 8 mph.
Sunday Night
Clear, with a low around 77. South wind 3 to 6 mph.
Monday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Sunny, with a high near 93. South wind 3 to 6 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 92. Light south wind.
Tuesday Night
Mostly clear, with a low around 75. Calm wind.
Wednesday
Sunny, with a high near 93. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 76. South southwest wind around 6 mph becoming calm in the evening.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind 3 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Carterville IL
 37.72°N 89.12°W
Last Update:
2:00 am CDT Jun 21, 2025
Forecast Valid:
3am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation