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.

Light Rain

61°F

16°C

Humidity 94%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 7 Mar 7:47 am CST
Extended Forecast for

Marion IL

  • Today

    Today: Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. High near 73. West wind 8 to 14 mph becoming south southwest in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 73 °F

    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers before 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. Calm wind becoming southwest around 5 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47. South southwest wind 3 to 6 mph.

    Low: 47 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 79. South southwest wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 79 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 62. South southwest wind around 17 mph, with gusts as high as 30 mph.

    Low: 62 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Cloudy, with a high near 71. South southwest wind around 18 mph becoming north northwest in the afternoon. Winds could gust as high as 30 mph.

    High: 71 °F

    Showers

Detailed Forecast

Today
Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. High near 73. West wind 8 to 14 mph becoming south southwest in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Tonight
A 20 percent chance of showers before 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 66. Calm wind becoming southwest around 5 mph.
Sunday Night
Clear, with a low around 47. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 79. South southwest wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 62. South southwest wind around 17 mph, with gusts as high as 30 mph.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 71. South southwest wind around 18 mph becoming north northwest in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
A chance of showers before midnight. Mostly cloudy, with a low around 36. North northwest wind 7 to 16 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 56. Northwest wind 7 to 9 mph.
Thursday Night
Mostly cloudy, with a low around 40. West wind 6 to 11 mph becoming south in the evening. Winds could gust as high as 21 mph.
Friday
Mostly cloudy, with a high near 65. South southwest wind 13 to 17 mph, with gusts as high as 28 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
7:37 am CST Mar 7, 2026
Forecast Valid:
8am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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