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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

66°F

19°C

Humidity 94%
Wind Speed S 9 mph
Barometer 29.93 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 10 Mar 7:45 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Mostly cloudy, with a high near 80. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after midnight. Cloudy, with a low around 66. South southwest wind 14 to 16 mph, with gusts as high as 28 mph.

    Low: 66 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 4pm, then showers likely. Temperature rising to near 72 by 11am, then falling to around 54 during the remainder of the day. South southwest wind 15 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.

    High: 72 °F⇓

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 7pm. Mostly cloudy, with a low around 36. Breezy, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    Low: 36 °F

    Showers
    Likely and
    Breezy then
    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 56. North wind around 6 mph becoming west in the afternoon.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. South wind 5 to 15 mph, with gusts as high as 28 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. South southwest wind 10 to 15 mph, with gusts as high as 28 mph.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42. West wind around 5 mph becoming east after midnight.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 70. East southeast wind 6 to 13 mph becoming south in the afternoon. Winds could gust as high as 22 mph.

    High: 70 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 80. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after midnight. Cloudy, with a low around 66. South southwest wind 14 to 16 mph, with gusts as high as 28 mph.
Wednesday
Showers and possibly a thunderstorm before 4pm, then showers likely. Temperature rising to near 72 by 11am, then falling to around 54 during the remainder of the day. South southwest wind 15 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely, mainly before 7pm. Mostly cloudy, with a low around 36. Breezy, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Thursday
Sunny, with a high near 56. North wind around 6 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 43. South wind 5 to 15 mph, with gusts as high as 28 mph.
Friday
Partly sunny, with a high near 65. South southwest wind 10 to 15 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 42. West wind around 5 mph becoming east after midnight.
Saturday
Sunny, with a high near 70. East southeast wind 6 to 13 mph becoming south in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 56. South wind 10 to 14 mph, with gusts as high as 25 mph.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 67. Breezy, with a south southwest wind 15 to 21 mph becoming west northwest in the afternoon. Winds could gust as high as 32 mph.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 27. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 28 mph.
Monday
A slight chance of snow showers. Mostly sunny, with a high near 40. Northwest wind around 14 mph, with gusts as high as 22 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:
8:01 am CDT Mar 10, 2026
Forecast Valid:
8am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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