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 75%
Wind Speed N 12 mph
Barometer 30.15 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 6 Feb 6:45 pm CST
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. North northwest wind 6 to 9 mph.

    Low: 24 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 35. North northeast wind around 6 mph becoming calm in the afternoon.

    High: 35 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 24 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 49. South southwest wind 3 to 8 mph.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59. Calm wind becoming southwest around 5 mph.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers after noon. Mostly cloudy, with a high near 65. South southwest wind 5 to 9 mph.

    High: 65 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 45. South southwest wind around 7 mph becoming west northwest after midnight.

    Low: 45 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 24. North northwest wind 6 to 9 mph.
Saturday
Sunny, with a high near 35. North northeast wind around 6 mph becoming calm in the afternoon.
Saturday Night
Partly cloudy, with a low around 24. Calm wind becoming south southeast around 6 mph after midnight.
Sunday
Mostly sunny, with a high near 49. South southwest wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 31. Calm wind.
Monday
Sunny, with a high near 59. Calm wind becoming southwest around 5 mph.
Monday Night
Partly cloudy, with a low around 42. Calm wind becoming south southwest around 5 mph after midnight.
Tuesday
A slight chance of showers after noon. Mostly cloudy, with a high near 65. South southwest wind 5 to 9 mph.
Tuesday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 45. South southwest wind around 7 mph becoming west northwest after midnight.
Wednesday
A chance of showers, mainly before noon. Mostly cloudy, with a high near 55. Northwest wind 7 to 10 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 33. North northeast wind around 6 mph.
Thursday
A slight chance of showers. Mostly cloudy, with a high near 48. North wind 5 to 7 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 32. North northeast wind 3 to 5 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 46. North northeast wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
3:21 pm CST Feb 6, 2026
Forecast Valid:
7pm CST Feb 6, 2026-6pm CST Feb 13, 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