Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

41°F

5°C

Humidity 87%
Wind Speed S 6 mph
Barometer 30.10 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 21 Jan 5:47 pm CST
Extended Forecast for

Marion IL

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
  • Tonight

    Tonight: Mostly clear, with a low around 24. Southwest wind around 6 mph becoming light and variable  after midnight.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 41. Light north northwest wind.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 18. Light north wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

    Low: 18 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 23. North wind around 14 mph, with gusts as high as 23 mph.

    High: 23 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of snow showers after midnight.  Cloudy, with a low around 7. North northeast wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 7 °F

    Cloudy then
    Chance Snow
    Showers

  • Saturday

    Saturday: Snow showers.  High near 16. Northeast wind 11 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 80%.

    High: 16 °F

    Snow Showers

  • Saturday Night

    Saturday Night: Snow showers.  Low around 10. North northeast wind 8 to 10 mph, with gusts as high as 18 mph.  Chance of precipitation is 80%.

    Low: 10 °F

    Snow Showers

  • Sunday

    Sunday: A chance of snow showers, mainly before noon.  Mostly cloudy, with a high near 19. North northwest wind 7 to 10 mph.

    High: 19 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 3. West northwest wind around 6 mph.

    Low: 3 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 24. Southwest wind around 6 mph becoming light and variable after midnight.
Thursday
Mostly sunny, with a high near 41. Light north northwest wind.
Thursday Night
Mostly cloudy, with a low around 18. Light north wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Friday
Mostly cloudy, with a high near 23. North wind around 14 mph, with gusts as high as 23 mph.
Friday Night
A 40 percent chance of snow showers after midnight. Cloudy, with a low around 7. North northeast wind 11 to 14 mph, with gusts as high as 23 mph.
Saturday
Snow showers. High near 16. Northeast wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday Night
Snow showers. Low around 10. North northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Sunday
A chance of snow showers, mainly before noon. Mostly cloudy, with a high near 19. North northwest wind 7 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 3. West northwest wind around 6 mph.
Monday
Mostly sunny, with a high near 18. West northwest wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 2. West southwest wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 27. South southwest wind 3 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 14. South southwest wind around 6 mph.
Wednesday
Partly sunny, with a high near 31. West wind 6 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
3:41 pm CST Jan 21, 2026
6pm CST Jan 21, 2026-6pm CST Jan 28, 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