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

61°F

16°C

Humidity 45%
Wind Speed W 12 mph
Barometer 30.33 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 6 Apr 10:47 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 67. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. North wind 3 to 6 mph.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. East northeast wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39. East wind around 6 mph.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. East southeast wind 5 to 10 mph becoming south in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South southeast wind around 8 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 75. South wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. South wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. Southwest wind 6 to 9 mph.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 67. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 41. North wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 60. East northeast wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 39. East wind around 6 mph.
Wednesday
Mostly sunny, with a high near 74. East southeast wind 5 to 10 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 53. South southeast wind around 8 mph.
Thursday
Sunny, with a high near 75. South wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 55. South wind around 6 mph.
Friday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. Southwest wind 6 to 9 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 58. South southwest wind around 5 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Light and variable wind becoming south southeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 61. Southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 84. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
10:43 am CDT Apr 6, 2026
Forecast Valid:
10am CDT Apr 6, 2026-6pm CDT Apr 12, 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