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.

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

  • Today

    Today: Mostly sunny, with a high near 38. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 26. Calm wind becoming south southwest 5 to 9 mph after midnight.

    Low: 26 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 42. Southwest wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 42 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 51. Southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 51 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 39. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 39 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25. South wind 5 to 7 mph becoming north northwest after midnight.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 37. Northwest wind 7 to 11 mph.

    High: 37 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 38. North wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Increasing clouds, with a low around 26. Calm wind becoming south southwest 5 to 9 mph after midnight.
Tuesday
Mostly sunny, with a high near 49. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Increasing clouds, with a low around 42. Southwest wind 14 to 16 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 51. Southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
Mostly cloudy, with a low around 28. Northwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 39. Calm wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 25. South wind 5 to 7 mph becoming north northwest after midnight.
Friday
Partly sunny, with a high near 37. Northwest wind 7 to 11 mph.
Friday Night
Mostly cloudy, with a low around 12. North northwest wind 8 to 10 mph.
Saturday
Mostly sunny, with a high near 23. North wind 5 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 12. Calm wind becoming north around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 30. North wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
5:01 am CST Dec 8, 2025
Forecast Valid:
5am CST Dec 8, 2025-6pm CST Dec 14, 2025
 
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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