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

43°F

6°C

Humidity 61%
Wind Speed SW 9 mph
Barometer 29.77 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 6 Feb 8:45 am CST
Extended Forecast for

Marion IL

  • Today

    Today: Mostly sunny, with a high near 46. North northwest wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. North northwest wind 6 to 9 mph.

    Low: 23 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 35. North northeast wind around 6 mph becoming light and variable in the afternoon.

    High: 35 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 24. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 24 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 50. South southwest wind 5 to 8 mph.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32. Light south wind.

    Low: 32 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59. Calm wind becoming southwest around 5 mph.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers, mainly after noon. Mostly cloudy, with a high near 65. South southwest wind 6 to 9 mph.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 46. North northwest wind 10 to 15 mph, with gusts as high as 26 mph.
Tonight
Mostly cloudy, with a low around 23. North northwest wind 6 to 9 mph.
Saturday
Sunny, with a high near 35. North northeast wind around 6 mph becoming light and variable in the afternoon.
Saturday Night
Increasing clouds, with a low around 24. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 50. South southwest wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 32. Light south wind.
Monday
Sunny, with a high near 59. Calm wind becoming southwest around 5 mph.
Monday Night
Partly cloudy, with a low around 42. Calm wind becoming south southwest around 6 mph after midnight.
Tuesday
A chance of showers, mainly after noon. Mostly cloudy, with a high near 65. South southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 42. Southwest wind around 7 mph becoming northwest after midnight.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 54. North northwest wind 6 to 9 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 33. North wind around 5 mph.
Thursday
A slight chance of showers. Mostly cloudy, with a high near 47. North wind 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
7:21 am CST Feb 6, 2026
Forecast Valid:
9am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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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