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

69°F

21°C

Humidity 97%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 24 Jul 9:35 pm CDT
Extended Forecast for

2 Miles WSW New Burnside IL

Heat Advisory July 26, 11:00am until July 28, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: A chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85. Calm wind becoming south around 5 mph.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Mostly sunny, with a high near 92. Calm wind.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 95. Southwest wind 3 to 8 mph.

    High: 95 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South southwest wind around 7 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. West northwest wind 5 to 8 mph.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. North northwest wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.
Saturday
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85. Calm wind becoming south around 5 mph.
Saturday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Sunday
Mostly sunny, with a high near 92. Calm wind.
Sunday Night
Mostly clear, with a low around 73. Calm wind.
Monday
Mostly sunny, with a high near 95. Southwest wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 77. South southwest wind around 7 mph.
Tuesday
Sunny, with a high near 96. West northwest wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 73. North northwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. North northeast wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 71. Light northeast wind.
Thursday
Sunny, with a high near 91. Calm wind becoming east northeast around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 72. Calm wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW New Burnside IL
 37.57°N 88.79°W
Last Update:
8:25 pm CDT Jul 24, 2026
Forecast Valid:
9pm CDT Jul 24, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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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