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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

15°F

-9°C

Humidity 64%
Wind Speed Calm
Barometer 30.47 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Last update 1 Feb 2:15 am CST
Extended Forecast for

Marion IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 6. West wind 3 to 5 mph.

    Low: 6 °F

    Mostly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 30. Wind chill values as low as -1. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 30 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 50 percent chance of snow before 11pm. Mostly cloudy, with a low around 20. South southwest wind 5 to 7 mph.

    Low: 20 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39. Southwest wind 3 to 6 mph.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow showers before 9am, then a slight chance of rain and snow showers between 9am and 3pm, then a slight chance of snow showers after 3pm. Cloudy, with a high near 37. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 37 °F

    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. North wind around 6 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 5 to 8 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12. Light and variable wind.

    Low: 12 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 6. West wind 3 to 5 mph.
Sunday
Increasing clouds, with a high near 30. Wind chill values as low as -1. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Sunday Night
A 50 percent chance of snow before 11pm. Mostly cloudy, with a low around 20. South southwest wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 39. Southwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 25. Calm wind.
Tuesday
A slight chance of snow showers before 9am, then a slight chance of rain and snow showers between 9am and 3pm, then a slight chance of snow showers after 3pm. Cloudy, with a high near 37. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 20. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 31. North wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 12. Light and variable wind.
Thursday
Mostly sunny, with a high near 36. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 27. Southwest wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 46. West southwest wind 7 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 21. North wind around 6 mph.
Saturday
Mostly sunny, with a high near 34. North northeast wind around 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
1:16 am CST Feb 1, 2026
Forecast Valid:
2am CST Feb 1, 2026-6pm CST Feb 7, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation