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.

Partly Cloudy

37°F

3°C

Humidity 56%
Wind Speed S 5 mph
Barometer 30.21 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 2 Feb 11:45 am CST
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 39. South southwest wind around 6 mph.

    High: 39 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. East southeast wind 3 to 5 mph.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of drizzle, snow, and freezing rain before 10am, then a chance of drizzle between 10am and 5pm. Cloudy, with a high near 37. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 40%.

    High: 37 °F

    Chance Wintry
    Mix then
    Chance
    Drizzle

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. North wind 5 to 7 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 32. North wind 3 to 7 mph.

    High: 32 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14. Calm wind.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. Southwest wind 6 to 8 mph.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 47. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 39. South southwest wind around 6 mph.
Tonight
Mostly cloudy, with a low around 27. East southeast wind 3 to 5 mph.
Tuesday
A chance of drizzle, snow, and freezing rain before 10am, then a chance of drizzle between 10am and 5pm. Cloudy, with a high near 37. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 22. North wind 5 to 7 mph.
Wednesday
Partly sunny, with a high near 32. North wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 14. Calm wind.
Thursday
Mostly sunny, with a high near 37. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 28. Southwest wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 47. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 23. North northwest wind around 6 mph.
Saturday
Sunny, with a high near 38. North northeast wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 23. Light and variable wind becoming southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 43. South wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
10:57 am CST Feb 2, 2026
Forecast Valid:
12pm CST Feb 2, 2026-6pm CST Feb 8, 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