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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

59°F

15°C

Humidity 94%
Wind Speed S 15 G 21 mph
Barometer 29.97 in
Dewpoint 57°F (14°C)
Visibility 8.00 mi
Last update 9 Mar 10:45 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Partly sunny, with a high near 73. South southwest wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 73 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South southwest wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 79. South southwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 79 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 65. South southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.

    Low: 65 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 72. South southwest wind 15 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 72 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 10 to 20 mph, with gusts as high as 29 mph.

    Low: 35 °F

    Slight Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42. South wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 66. Southwest wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 66 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 73. South southwest wind 13 to 16 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 62. South southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 79. South southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 65. South southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 72. South southwest wind 15 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 10 to 20 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 42. South wind 6 to 14 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 66. Southwest wind 11 to 15 mph, with gusts as high as 24 mph.
Friday Night
Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming east after midnight.
Saturday
Sunny, with a high near 68. East wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around 52. South wind 9 to 11 mph, with gusts as high as 22 mph.
Sunday
A chance of showers. Mostly cloudy, with a high near 71. South southwest wind 14 to 18 mph, with gusts as high as 29 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
9:57 am CDT Mar 9, 2026
Forecast Valid:
11am CDT Mar 9, 2026-6pm CDT Mar 15, 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