National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

47°F

8°C

Humidity 76%
Wind Speed S 6 mph
Barometer 30.00 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 8 Mar 9:15 pm CDT
Extended Forecast for

5 Miles S Marion IL

  • Tonight

    Tonight: Clear, with a low around 48. South southwest wind around 7 mph.

    Low: 48 °F

    Clear

  • Monday

    Monday: Mostly sunny, with a high near 74. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 74 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 26 mph.

    High: 78 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 64. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 71. South southwest wind around 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 39. Breezy, with a north northwest wind 14 to 22 mph, with gusts as high as 31 mph.

    Low: 39 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 55. North northwest wind 8 to 10 mph becoming southwest in the afternoon.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. South wind 5 to 14 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 48. South southwest wind around 7 mph.
Monday
Mostly sunny, with a high near 74. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 64. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 71. South southwest wind around 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 39. Breezy, with a north northwest wind 14 to 22 mph, with gusts as high as 31 mph.
Thursday
Sunny, with a high near 55. North northwest wind 8 to 10 mph becoming southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 43. South wind 5 to 14 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 67. Southwest wind 13 to 15 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 41. West northwest wind around 7 mph becoming northeast after midnight.
Saturday
Mostly sunny, with a high near 64. East southeast wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 46. East wind around 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.
Sunday
A chance of showers. Partly sunny, with a high near 67. South southwest wind 11 to 15 mph, with gusts as high as 26 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Marion IL
 37.65°N 88.95°W
Last Update:
8:56 pm CDT Mar 8, 2026
Forecast Valid:
9pm CDT Mar 8, 2026-6pm CDT Mar 15, 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