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.

Fair

54°F

12°C

Humidity 94%
Wind Speed W 2 mph
Barometer 30.02 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 6 Oct 10:35 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Clear, with a low around 51. Calm wind.

    Low: 51 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming west southwest 5 to 8 mph in the morning.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South southwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Light north northeast wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 84. Calm wind becoming east 5 to 7 mph in the morning.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57. Light east southeast wind.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East southeast wind around 7 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 51. Calm wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming west southwest 5 to 8 mph in the morning.
Wednesday Night
Mostly clear, with a low around 57. South southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 53. Light north northeast wind.
Friday
Sunny, with a high near 84. Calm wind becoming east 5 to 7 mph in the morning.
Friday Night
Clear, with a low around 57. Light east southeast wind.
Saturday
Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East southeast wind around 7 mph.
Sunday
A chance of showers. Partly sunny, with a high near 76. East southeast wind 6 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 57. Light west northwest wind.
Columbus Day
Mostly sunny, with a high near 81. Calm wind becoming north northwest 5 to 8 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. Light and variable wind.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 82. South southwest wind 5 to 11 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
7:20 pm CDT Oct 6, 2026
Forecast Valid:
11pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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