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.

Light Drizzle

72°F

22°C

Humidity 94%
Wind Speed SE 6 mph
Barometer 30.07 in
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 6 Oct 5:46 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 67. Southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 67 °F

    Chance
    T-storms then
    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms, mainly before 1pm. High near 78. Calm wind becoming north 5 to 9 mph in the afternoon. Chance of precipitation is 80%.

    High: 78 °F

    Showers then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55. North wind 7 to 9 mph.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45. Northeast wind around 6 mph.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 70. Northeast wind 6 to 9 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. East northeast wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Light and variable wind.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 67. Southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 80%.
Tuesday
Showers and thunderstorms, mainly before 1pm. High near 78. Calm wind becoming north 5 to 9 mph in the afternoon. Chance of precipitation is 80%.
Tuesday Night
Mostly cloudy, with a low around 55. North wind 7 to 9 mph.
Wednesday
Sunny, with a high near 73. Northeast wind 10 to 13 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 45. Northeast wind around 6 mph.
Thursday
Sunny, with a high near 70. Northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 42. East northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 75. Light and variable wind.
Friday Night
Mostly clear, with a low around 51. Calm wind.
Saturday
Sunny, with a high near 79. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 51. Light east wind.
Sunday
Sunny, with a high near 78. Calm wind becoming south southeast 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 54. Light east southeast wind.
Columbus Day
Sunny, with a high near 81. South southeast wind 3 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
6:01 pm CDT Oct 6, 2025
Forecast Valid:
6pm CDT Oct 6, 2025-6pm CDT Oct 13, 2025
 
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