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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. Light south wind becoming south southwest 5 to 9 mph.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 22. Light and variable wind becoming north 5 to 10 mph after midnight.

    Low: 22 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 31. North wind 5 to 10 mph becoming light north northeast in the afternoon.

    High: 31 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19. Calm wind.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 43. Calm wind becoming west southwest around 6 mph.

    High: 43 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27. Light east southeast wind.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 21. Calm wind.
Wednesday
Mostly sunny, with a high near 43. Light south wind becoming south southwest 5 to 9 mph.
Wednesday Night
Increasing clouds, with a low around 22. Light and variable wind becoming north 5 to 10 mph after midnight.
Thursday
Partly sunny, with a high near 31. North wind 5 to 10 mph becoming light north northeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 19. Calm wind.
Friday
Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.
Friday Night
Partly cloudy, with a low around 25. Calm wind.
Saturday
Mostly sunny, with a high near 43. Calm wind becoming west southwest around 6 mph.
Saturday Night
Mostly cloudy, with a low around 27. Light east southeast wind.
Sunday
A slight chance of showers after noon. Partly sunny, with a high near 41. Light and variable wind becoming east 5 to 8 mph in the morning.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 24. North wind 3 to 5 mph.
Monday
Partly sunny, with a high near 37. North wind 5 to 7 mph becoming south in the afternoon.
Monday Night
Mostly cloudy, with a low around 27. Calm wind becoming southwest around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 43. West southwest wind 6 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
7:21 pm CST Dec 2, 2025
Forecast Valid:
11pm CST Dec 2, 2025-6pm CST Dec 9, 2025
 
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