National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

70°F

21°C

Humidity 33%
Wind Speed S 12 mph
Barometer 29.91 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 14 Mar 4:45 pm CDT
Extended Forecast for

Marion IL

Wind Advisory March 15, 10:00am until March 16, 07:00am
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Increasing clouds, with a low around 56. South wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 18 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.

    High: 71 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 10pm, then rain, possibly mixed with snow showers between 10pm and 1am, then a slight chance of snow showers after 1am. Some thunder is also possible. Low around 26. Breezy, with a west wind 20 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Rain/Snow and
    Breezy

  • Monday

    Monday: Mostly cloudy, with a high near 34. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 36 mph.

    High: 34 °F

    Mostly Cloudy
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 16. West northwest wind 7 to 16 mph, with gusts as high as 24 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 40. Northwest wind around 7 mph becoming west southwest in the afternoon.

    High: 40 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 31. Light south wind increasing to 6 to 11 mph in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. South wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42. South southwest wind 5 to 7 mph.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 56. South wind 7 to 14 mph, with gusts as high as 24 mph.
Sunday
A chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 18 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before 10pm, then rain, possibly mixed with snow showers between 10pm and 1am, then a slight chance of snow showers after 1am. Some thunder is also possible. Low around 26. Breezy, with a west wind 20 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 34. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 36 mph.
Monday Night
Mostly clear, with a low around 16. West northwest wind 7 to 16 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 40. Northwest wind around 7 mph becoming west southwest in the afternoon.
Tuesday Night
A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 31. Light south wind increasing to 6 to 11 mph in the evening. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 61. South wind 13 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 42. South southwest wind 5 to 7 mph.
Thursday
Sunny, with a high near 71. Southwest wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around 48. South wind around 5 mph.
Friday
Sunny, with a high near 74. South southwest wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around 49. West southwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 77. West northwest wind 7 to 10 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:
1:26 pm CDT Mar 14, 2026
Forecast Valid:
5pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
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