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

28°F

-2°C

Humidity 69%
Wind Speed S 9 mph
Barometer 30.24 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 11 Nov 6:45 am CST
Extended Forecast for

Marion IL

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 50. South southwest wind 8 to 18 mph, with gusts as high as 29 mph.

    High: 50 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 37. Southwest wind 6 to 15 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64. Southwest wind 5 to 8 mph becoming west northwest in the afternoon.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 64. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind 3 to 6 mph.

    Low: 48 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 72. South wind 6 to 10 mph.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. South wind 6 to 8 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Veterans Day
Partly sunny, with a high near 50. South southwest wind 8 to 18 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 37. Southwest wind 6 to 15 mph, with gusts as high as 24 mph.
Wednesday
Sunny, with a high near 64. Southwest wind 5 to 8 mph becoming west northwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 37. Calm wind.
Thursday
Partly sunny, with a high near 64. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 72. South wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 56. South wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday Night
A chance of showers, mainly after midnight. Partly cloudy, with a low around 56. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 70. West wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 47. West wind 5 to 8 mph.
Monday
A chance of showers. Partly sunny, with a high near 59. South southeast wind 7 to 10 mph, with gusts as high as 18 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
5:26 am CST Nov 11, 2025
Forecast Valid:
7am CST Nov 11, 2025-6pm CST Nov 17, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation