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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

46°F

8°C

Humidity 46%
Wind Speed SW 14 G 21 mph
Barometer 29.91 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 13 Mar 5:35 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 65. South southwest wind 13 to 18 mph becoming west in the afternoon. Winds could gust as high as 33 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 38. Northwest wind around 6 mph becoming light and variable.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 68. East wind 7 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. South wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 15 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 60%.

    High: 73 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 27. Breezy, with a south wind 20 to 22 mph becoming west after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 90%.

    Low: 27 °F

    Breezy.
    Showers then
    Rain/Snow

  • Monday

    Monday: A 20 percent chance of snow showers before 1pm. Mostly cloudy, with a high near 34. Breezy, with a west northwest wind 18 to 22 mph, with gusts as high as 36 mph.

    High: 34 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Northwest wind 10 to 18 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. West wind around 9 mph.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 65. South southwest wind 13 to 18 mph becoming west in the afternoon. Winds could gust as high as 33 mph.
Tonight
Mostly clear, with a low around 38. Northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 68. East wind 7 to 13 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 55. South wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 15 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 27. Breezy, with a south wind 20 to 22 mph becoming west after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 90%.
Monday
A 20 percent chance of snow showers before 1pm. Mostly cloudy, with a high near 34. Breezy, with a west northwest wind 18 to 22 mph, with gusts as high as 36 mph.
Monday Night
Mostly clear, with a low around 15. Northwest wind 10 to 18 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 38. West wind around 9 mph.
Tuesday Night
Mostly cloudy, with a low around 28. South southeast wind 5 to 10 mph.
Wednesday
Mostly cloudy, with a high near 57. South wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 42. South southwest wind around 7 mph.
Thursday
Sunny, with a high near 69. South southwest wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
5:26 am CDT Mar 13, 2026
Forecast Valid:
5am CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation