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

37°F

3°C

Humidity 56%
Wind Speed NW 12 mph
Barometer 30.21 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 21 Feb 3:47 pm CST
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 42. Northwest wind around 8 mph.

    High: 42 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 23. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 34. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 34 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 35. North northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 35 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. Northwest wind around 5 mph becoming calm in the evening.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. South southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 50 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 44 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 60 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 42. Northwest wind around 8 mph.
Tonight
Mostly clear, with a low around 23. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 34. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.
Sunday Night
Partly cloudy, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 35. North northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 19. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 50. South southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 44. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a high near 60. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 38. Southwest wind around 9 mph becoming north northwest after midnight.
Thursday
A chance of showers. Partly sunny, with a high near 52. Northwest wind 7 to 10 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 29. Northwest wind around 6 mph becoming light and variable.
Friday
Sunny, with a high near 58. South southwest wind 5 to 9 mph.
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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:
3:21 pm CST Feb 21, 2026
Forecast Valid:
4pm CST Feb 21, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

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