Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

48°F

9°C

Humidity 94%
Wind Speed N 12 mph
Barometer 30.00 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 18 Apr 10:47 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: A 30 percent chance of showers, mainly before 3pm.  Mostly cloudy, with a steady temperature around 58. North northwest wind around 14 mph, with gusts as high as 24 mph.

    High: 58 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 40. North northwest wind 5 to 9 mph becoming calm  after midnight.

    Low: 40 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West wind around 5 mph becoming light and variable  in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Light and variable wind becoming east southeast around 6 mph in the morning.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. Southeast wind 3 to 6 mph.

    Low: 51 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southwest wind 6 to 9 mph.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. Southwest wind 5 to 9 mph.

    High: 82 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers, mainly before 3pm. Mostly cloudy, with a steady temperature around 58. North northwest wind around 14 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 40. North northwest wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 69. Light southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 42. West wind around 5 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 68. Light and variable wind becoming east southeast around 6 mph in the morning.
Monday Night
Clear, with a low around 51. Southeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 79. Southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 57. Southwest wind 6 to 9 mph.
Wednesday
Sunny, with a high near 82. Southwest wind 5 to 9 mph.
Wednesday Night
Clear, with a low around 60. South wind around 6 mph.
Thursday
Sunny, with a high near 84. South wind 6 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 63. South wind around 11 mph, with gusts as high as 21 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
10:46 am CDT Apr 18, 2026
11am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database