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.

Partly Cloudy

31°F

-1°C

Humidity 62%
Wind Speed W 6 mph
Barometer 29.99 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 17 Jan 2:15 am CST
Extended Forecast for

Marion IL

  • Overnight

    Overnight: A chance of flurries. Partly cloudy, with a low around 25. West northwest wind around 9 mph, with gusts as high as 22 mph.

    Low: 25 °F

    Chance
    Flurries

  • Saturday

    Saturday: A chance of flurries before 9am, then a slight chance of snow showers between 9am and 1pm, then a chance of flurries after 1pm. Partly sunny, with a high near 32. West northwest wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 32 °F

    Slight Chance
    Snow Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 14. West northwest wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 14 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 32. Light west wind becoming southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 32 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

    Low: 16 °F

    Partly Cloudy

  • 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 36. Light southwest wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 36 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 28. South wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of flurries. Partly cloudy, with a low around 25. West northwest wind around 9 mph, with gusts as high as 22 mph.
Saturday
A chance of flurries before 9am, then a slight chance of snow showers between 9am and 1pm, then a chance of flurries after 1pm. Partly sunny, with a high near 32. West northwest wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 14. West northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday
Increasing clouds, with a high near 32. Light west wind becoming southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 16. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 21 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 36. Light southwest wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 28. South wind 10 to 14 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 46. Southwest wind 7 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 24. Southwest wind around 6 mph becoming north after midnight.
Thursday
A slight chance of rain and snow showers. Mostly sunny, with a high near 36. North wind 5 to 7 mph.
Thursday Night
A slight chance of snow showers. Partly cloudy, with a low around 20. Light and variable wind becoming east around 5 mph after midnight.
Friday
A slight chance of showers. Mostly sunny, with a high near 38. East southeast wind 5 to 8 mph becoming south southwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
1:57 am CST Jan 17, 2026
Forecast Valid:
2am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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