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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

21°F

-6°C

Humidity 57%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 15 Jan 4:15 am CST
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 34. Northwest wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: A chance of snow showers between 11pm and 1am. Mostly cloudy, with a temperature falling to near 27 by 11pm, then rising to around 33 during the remainder of the night. Light south wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    Low: 27 °F⇑

    Chance Snow
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 46. West southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 46 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of rain showers before 9pm, then a slight chance of rain and snow showers between 9pm and midnight, then a slight chance of snow showers after midnight. Mostly cloudy, with a low around 25. West wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 31. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 31 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 12. Northwest wind around 7 mph.

    Low: 12 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 27. West northwest wind 6 to 10 mph becoming southwest in the afternoon.

    High: 27 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 16. South southwest wind 6 to 9 mph becoming west northwest after midnight.

    Low: 16 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 29. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 29 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 34. Northwest wind 5 to 8 mph becoming light and variable in the afternoon.
Tonight
A chance of snow showers between 11pm and 1am. Mostly cloudy, with a temperature falling to near 27 by 11pm, then rising to around 33 during the remainder of the night. Light south wind becoming south southwest 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 46. West southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
A slight chance of rain showers before 9pm, then a slight chance of rain and snow showers between 9pm and midnight, then a slight chance of snow showers after midnight. Mostly cloudy, with a low around 25. West wind 6 to 8 mph. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 31. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 12. Northwest wind around 7 mph.
Sunday
Sunny, with a high near 27. West northwest wind 6 to 10 mph becoming southwest in the afternoon.
Sunday Night
Mostly clear, with a low around 16. South southwest wind 6 to 9 mph becoming west northwest after midnight.
M.L.King Day
Mostly sunny, with a high near 29. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 11. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 31. Light west wind increasing to 5 to 10 mph in the morning.
Tuesday Night
Mostly clear, with a low around 20. South wind around 8 mph.
Wednesday
Mostly sunny, with a high near 44. South southwest wind 7 to 10 mph.
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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:
3:16 am CST Jan 15, 2026
Forecast Valid:
4am CST Jan 15, 2026-6pm CST Jan 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

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