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

28°F

-2°C

Humidity 69%
Wind Speed N 14 mph
Barometer 30.35 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 4 Feb 12:45 pm CST
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 31. North wind 8 to 11 mph.

    High: 31 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.

    Low: 15 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 35. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 35 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 28. South southwest wind 3 to 6 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 49. West southwest wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27. North northwest wind 6 to 8 mph.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 37. North northeast wind around 6 mph becoming east in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. Southeast wind 3 to 6 mph.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 52. South southwest wind 5 to 8 mph.

    High: 52 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 31. North wind 8 to 11 mph.
Tonight
Mostly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly cloudy, with a high near 35. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 28. South southwest wind 3 to 6 mph.
Friday
Sunny, with a high near 49. West southwest wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Mostly cloudy, with a low around 27. North northwest wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 37. North northeast wind around 6 mph becoming east in the afternoon.
Saturday Night
Mostly cloudy, with a low around 25. Southeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 52. South southwest wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 32. Light west southwest wind.
Monday
Sunny, with a high near 56. Calm wind becoming southwest around 5 mph.
Monday Night
Partly cloudy, with a low around 40. Light south southwest wind.
Tuesday
A slight chance of showers. Mostly cloudy, with a high near 61. South southwest wind 3 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
12:12 pm CST Feb 4, 2026
Forecast Valid:
12pm CST Feb 4, 2026-6pm CST Feb 10, 2026
 
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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