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.

Overcast

39°F

4°C

Humidity 68%
Wind Speed SW 6 mph
Barometer 29.88 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 16 Jan 7:55 pm CST
Extended Forecast for

Marion IL

  • Tonight

    Tonight: A slight chance of rain and snow showers before 1am, then a slight chance of snow showers between 1am and 3am. Mostly cloudy, with a low around 25. West northwest wind around 7 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 32. West northwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 32 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 14. West northwest wind 3 to 8 mph.

    Low: 14 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 31. Light west wind becoming southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 31 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. South southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 17 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 25. Northwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. Light and variable wind.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 35. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 35 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 26. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 26 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of rain and snow showers before 1am, then a slight chance of snow showers between 1am and 3am. Mostly cloudy, with a low around 25. West northwest wind around 7 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 32. West northwest wind 7 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 14. West northwest wind 3 to 8 mph.
Sunday
Sunny, with a high near 31. Light west wind becoming southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 17. South southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
M.L.King Day
Mostly sunny, with a high near 25. Northwest wind 6 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 11. Light and variable wind.
Tuesday
Sunny, with a high near 35. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 26. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 49. South southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 28. Southwest wind around 7 mph becoming northwest after midnight.
Thursday
A chance of showers. Mostly sunny, with a high near 39. Northwest wind 6 to 8 mph.
Thursday Night
A chance of rain or freezing rain. Partly cloudy, with a low around 26. North wind around 6 mph becoming east southeast after midnight.
Friday
A slight chance of showers. Mostly sunny, with a high near 42. East southeast wind 6 to 9 mph becoming south southwest in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
6:36 pm CST Jan 16, 2026
Forecast Valid:
8pm CST Jan 16, 2026-6pm CST Jan 23, 2026
 
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Additional Resources

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Chance of Precipitation