Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

30°F

-1°C

Humidity 86%
Wind Speed E 3 mph
Barometer 30.11 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 1 Dec 6:45 pm CST
Extended Forecast for

Marion IL

Winter Weather Advisory until December 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 2, 06:00am

    NOW until 6:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 23 °F

    Wintry Mix
    then Snow

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 32. Northwest wind 5 to 8 mph becoming calm  in the afternoon.

    High: 32 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42. Light south wind becoming south southwest 5 to 10 mph.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 5 to 10 mph after midnight. Winds could gust as high as 18 mph.

    Low: 21 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. North wind 5 to 10 mph becoming light north northeast  in the afternoon. Winds could gust as high as 18 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers after midnight.  Mostly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Friday

    Friday: A slight chance of rain and snow showers.  Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.

    High: 39 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Snow and freezing rain, becoming all snow after 1am, then gradually ending. Low around 23. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 80%. Little or no ice accumulation expected. Total nighttime snow accumulation of 1 to 2 inches possible.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 32. Northwest wind 5 to 8 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Calm wind.
Wednesday
Mostly sunny, with a high near 42. Light south wind becoming south southwest 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 5 to 10 mph after midnight. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 29. North wind 5 to 10 mph becoming light north northeast in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 18. Calm wind.
Friday
A slight chance of rain and snow showers. Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph.
Friday Night
Partly cloudy, with a low around 26. Calm wind.
Saturday
Mostly sunny, with a high near 43. Calm wind becoming southwest 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 29. Calm wind becoming west around 6 mph after midnight.
Sunday
Mostly cloudy, with a high near 41. West northwest wind 6 to 8 mph becoming north in the afternoon.
Sunday Night
Mostly cloudy, with a low around 22. North wind 3 to 5 mph.
Monday
Partly sunny, with a high near 39. Light and variable wind becoming north around 6 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
4:34 pm CST Dec 1, 2025
7pm CST Dec 1, 2025-6pm CST Dec 8, 2025
 
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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