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.

Fair

12°F

-11°C

Humidity 62%
Wind Speed NW 12 mph
Barometer 30.51 in
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 31 Jan 8:45 am CST
Extended Forecast for

Marion IL

Cold Weather Advisory January 31, 09:03am until January 31, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 31, 09:03am until January 31, 12:00pm

    NOW until 12:00pm Sat

    Cold Weather Advisory

  • Today

    High: 20 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 3. Northwest wind 3 to 8 mph.

    Low: 3 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 29. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 19. South southwest wind 3 to 6 mph.

    Low: 19 °F

    Mostly Cloudy

  • Monday

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

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow showers before noon, then a chance of rain showers. Mostly cloudy, with a high near 39. Calm wind becoming north northeast 5 to 7 mph in the morning. Chance of precipitation is 40%.

    High: 39 °F

    Slight Chance
    Rain/Snow
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers before midnight. Mostly cloudy, with a low around 21. North wind around 6 mph.

    Low: 21 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 20. Wind chill values as low as -1. Northwest wind 10 to 14 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 3. Northwest wind 3 to 8 mph.
Sunday
Partly sunny, with a high near 29. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 19. South southwest wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 39. West southwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 26. Calm wind.
Tuesday
A slight chance of rain and snow showers before noon, then a chance of rain showers. Mostly cloudy, with a high near 39. Calm wind becoming north northeast 5 to 7 mph in the morning. Chance of precipitation is 40%.
Tuesday Night
A slight chance of rain and snow showers before midnight. Mostly cloudy, with a low around 21. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 31. North wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 12. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 33. Calm wind becoming west around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around 22. South southwest wind 5 to 8 mph.
Friday
Mostly sunny, with a high near 43. Southwest wind 8 to 10 mph becoming northwest 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:
8:36 am CST Jan 31, 2026
Forecast Valid:
9am CST Jan 31, 2026-6pm CST Feb 6, 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