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.

Partly Cloudy

66°F

19°C

Humidity 76%
Wind Speed N 9 mph
Barometer 30.13 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 7 Oct 7:35 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North wind 7 to 10 mph.

    Low: 54 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 72. Northeast wind 10 to 14 mph, with gusts as high as 18 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 46. Northeast wind 3 to 6 mph.

    Low: 46 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 70. Northeast wind 6 to 9 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41. East northeast wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73. Light and variable wind.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 54. North wind 7 to 10 mph.
Wednesday
Sunny, with a high near 72. Northeast wind 10 to 14 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 46. Northeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 70. Northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 41. East northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 73. Light and variable wind.
Friday Night
Mostly clear, with a low around 50. Calm wind.
Saturday
Mostly sunny, with a high near 76. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 52. Calm wind.
Sunday
Sunny, with a high near 79. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 53. Light southeast wind.
Columbus Day
Sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 57. Light southeast wind.
Tuesday
Sunny, with a high near 81. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
6:16 pm CDT Oct 7, 2025
Forecast Valid:
7pm CDT Oct 7, 2025-6pm CDT Oct 14, 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