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.

Mostly Cloudy

36°F

2°C

Humidity 38%
Wind Speed NW 17 G 28 mph
Barometer 30.43 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 22 Feb 2:45 pm CST
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 34. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 16. North northwest wind around 14 mph, with gusts as high as 23 mph.

    Low: 16 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 34. North northwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 34 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. Calm wind becoming south around 5 mph after midnight.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Breezy, with a south southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 50 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. West southwest wind 11 to 16 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57. West southwest wind 5 to 7 mph becoming south southeast in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 41. Southeast wind 6 to 10 mph becoming west southwest after midnight. Winds could gust as high as 18 mph.

    Low: 41 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, mainly before noon. Partly sunny, with a high near 53. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 53 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 34. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.
Tonight
Increasing clouds, with a low around 16. North northwest wind around 14 mph, with gusts as high as 23 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 34. North northwest wind 6 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 19. Calm wind becoming south around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 50. Breezy, with a south southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph.
Tuesday Night
Mostly cloudy, with a low around 39. West southwest wind 11 to 16 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Wednesday
Mostly sunny, with a high near 57. West southwest wind 5 to 7 mph becoming south southeast in the afternoon.
Wednesday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 41. Southeast wind 6 to 10 mph becoming west southwest after midnight. Winds could gust as high as 18 mph.
Thursday
A chance of showers, mainly before noon. Partly sunny, with a high near 53. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 29. Northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 59. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 38. South wind around 6 mph.
Saturday
Sunny, with a high near 64. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
2:17 pm CST Feb 22, 2026
Forecast Valid:
3pm CST Feb 22, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation