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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Partly Cloudy

73°F

23°C

Humidity 50%
Wind Speed SW 15 G 21 mph
Barometer 30.25 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 10 Apr 10:45 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 80. Southwest wind 7 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 80 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Mostly cloudy, with a low around 55. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Light and variable wind becoming east southeast around 6 mph in the morning.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. Southeast wind around 6 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 82. South southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 82 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 67. South southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. South southwest wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 87 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 80. Southwest wind 7 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Mostly cloudy, with a low around 55. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Light and variable wind becoming east southeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 61. Southeast wind around 6 mph.
Sunday
Partly sunny, with a high near 82. South southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 67. South southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. South southwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Tuesday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. South southwest wind 11 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70. South southwest wind 11 to 13 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southwest wind 6 to 10 mph.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. South wind 7 to 11 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
8:57 am CDT Apr 10, 2026
Forecast Valid:
11am CDT Apr 10, 2026-6pm CDT Apr 16, 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