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.

Overcast

46°F

8°C

Humidity 82%
Wind Speed W 3 mph
Barometer 29.89 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 12 Nov 6:15 am CST
Extended Forecast for

Marion IL

  • Today

    Today: A chance of sprinkles between noon and 3pm, then a slight chance of showers after 3pm. Partly sunny, with a high near 56. Northwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 20%.

    High: 56 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A chance of sprinkles before 7pm. Partly cloudy, with a low around 31. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Chance
    Sprinkles

  • Friday

    Friday: Mostly sunny, with a high near 48. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 49. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 53. Light and variable wind.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54. Calm wind becoming east around 5 mph.

    High: 54 °F

    Sunny

Detailed Forecast

Today
A chance of sprinkles between noon and 3pm, then a slight chance of showers after 3pm. Partly sunny, with a high near 56. Northwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 20%.
Tonight
A chance of sprinkles before 7pm. Partly cloudy, with a low around 31. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 48. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 26. North northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 49. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Mostly clear, with a low around 26. Calm wind.
Sunday
Sunny, with a high near 53. Light and variable wind.
Sunday Night
Mostly clear, with a low around 28. Calm wind.
Monday
Sunny, with a high near 54. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 27. Calm wind.
Tuesday
Sunny, with a high near 57. Calm wind becoming east around 5 mph.
Tuesday Night
Clear, with a low around 29. Calm wind.
Wednesday
Sunny, with a high near 60. Calm wind becoming south southeast around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
4:36 am CST Nov 12, 2026
Forecast Valid:
6am CST Nov 12, 2026-6pm CST Nov 18, 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