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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 65. West northwest wind 5 to 8 mph.

    High: 65 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Calm wind becoming south around 6 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48. South wind 3 to 6 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73. South southwest wind 6 to 10 mph.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. South southwest wind 6 to 8 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 65. North northwest wind 5 to 9 mph.

    High: 65 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 65. West northwest wind 5 to 8 mph.
Tonight
Mostly clear, with a low around 38. Calm wind.
Thursday
Mostly sunny, with a high near 64. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 48. South wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 73. South southwest wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 57. South southwest wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 50. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 65. North northwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 42. Light and variable wind.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 61. Light and variable wind becoming south southeast 5 to 9 mph in the morning.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 45. East southeast wind around 7 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 62. South wind 6 to 9 mph becoming north northwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
5:21 am CST Nov 12, 2025
Forecast Valid:
6am CST Nov 12, 2025-6pm CST Nov 18, 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