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.

Mostly Cloudy

43°F

6°C

Humidity 76%
Wind Speed N 6 mph
Barometer 30.02 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Nov 6:47 pm CST
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Mostly clear, with a low around 32. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 48. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 48 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 27. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 27 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Sunny, with a high near 50. Calm wind becoming north northwest around 5 mph.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 53. Light and variable wind.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Calm wind becoming east around 5 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 32. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 48. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 27. North northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 50. Calm wind becoming north northwest around 5 mph.
Saturday Night
Mostly clear, with a low around 26. Calm wind.
Sunday
Sunny, with a high near 53. Light and variable wind.
Sunday Night
Mostly clear, with a low around 29. Calm wind.
Monday
Sunny, with a high near 55. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 29. Calm wind.
Tuesday
Sunny, with a high near 58. Calm wind becoming east southeast around 5 mph.
Tuesday Night
Clear, with a low around 29. Calm wind.
Wednesday
Sunny, with a high near 63. Calm wind becoming south around 6 mph.
Wednesday Night
Partly cloudy, with a low around 37. Calm wind.
Thursday
Mostly sunny, with a high near 66. 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:
3:20 pm CST Nov 12, 2026
Forecast Valid:
6pm CST Nov 12, 2026-6pm CST Nov 19, 2026
 
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Additional Resources

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Chance of Precipitation