National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

23°F

-5°C

Humidity 58%
Wind Speed NW 16 G 24 mph
Barometer 30.31 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 29 Dec 10:45 am CST
Extended Forecast for

Marion IL

  • Today

    Today: Mostly sunny, with a high near 27. West northwest wind 15 to 17 mph, with gusts as high as 26 mph.

    High: 27 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 36. Northwest wind 6 to 8 mph becoming southwest in the afternoon.

    High: 36 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27. Southwest wind around 6 mph.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45. West northwest wind 5 to 9 mph.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 26. Light west northwest wind.

    Low: 26 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 40. North wind 3 to 7 mph.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 42. Calm wind becoming east around 6 mph.

    High: 42 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 27. West northwest wind 15 to 17 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 36. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 27. Southwest wind around 6 mph.
Wednesday
Mostly sunny, with a high near 45. West northwest wind 5 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 26. Light west northwest wind.
New Year's Day
Mostly sunny, with a high near 40. North wind 3 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 24. Calm wind.
Friday
Mostly cloudy, with a high near 42. Calm wind becoming east around 6 mph.
Friday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 29. Light north northeast wind.
Saturday
Mostly sunny, with a high near 43. North wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 24. Light and variable wind.
Sunday
Mostly sunny, with a high near 44. South wind 3 to 7 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:
10:42 am CST Dec 29, 2025
Forecast Valid:
11am CST Dec 29, 2025-6pm CST Jan 4, 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