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

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Marion IL

  • Tonight

    Tonight: A slight chance of rain and snow showers before 1am, then a chance of flurries between 1am and 5am. Cloudy, with a low around 27. North wind 7 to 9 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 38. North wind 3 to 8 mph.

    High: 38 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 27. Calm wind becoming south southwest 5 to 9 mph after midnight. Winds could gust as high as 18 mph.

    Low: 27 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow showers after midnight. Mostly cloudy, with a low around 29. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow showers before noon, then a slight chance of rain showers. Mostly cloudy, with a high near 39. Light and variable wind becoming south southwest 5 to 7 mph in the morning.

    High: 39 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. North northwest wind 6 to 9 mph.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain and snow showers before 1am, then a chance of flurries between 1am and 5am. Cloudy, with a low around 27. North wind 7 to 9 mph. Chance of precipitation is 20%.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 38. North wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 27. Calm wind becoming south southwest 5 to 9 mph after midnight. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 49. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Southwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 52. Southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
A slight chance of rain and snow showers after midnight. Mostly cloudy, with a low around 29. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Mostly cloudy, with a high near 39. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 22. North northwest wind 6 to 9 mph.
Friday
Partly sunny, with a high near 31. Northwest wind 9 to 11 mph.
Friday Night
Partly cloudy, with a low around 9. Northwest wind around 9 mph.
Saturday
Mostly sunny, with a high near 24. Northwest wind 5 to 9 mph.
Saturday Night
Partly cloudy, with a low around 11. Calm wind becoming northwest around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 28. Northwest wind 5 to 8 mph becoming south in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
8:01 pm CST Dec 7, 2025
Forecast Valid:
10pm CST Dec 7, 2025-6pm CST Dec 14, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation