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

74°F

23°C

Humidity 43%
Wind Speed SW 15 G 21 mph
Barometer 30.01 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 12 Apr 11:15 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Mostly cloudy, with a low around 67. South southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 83. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 86. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 86 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 69 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 82. Southwest wind 8 to 10 mph.

    High: 82 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. South wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Mostly cloudy, with a low around 67. South southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 83. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 69. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday
Partly sunny, with a high near 86. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 69. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 82. Southwest wind 8 to 10 mph.
Thursday Night
Mostly clear, with a low around 63. South wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 88. South wind 5 to 11 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 67. South wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. West wind around 10 mph, with gusts as high as 18 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 64. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
11:01 pm CDT Apr 12, 2026
Forecast Valid:
11pm CDT Apr 12, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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