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.

Overcast

66°F

19°C

Humidity 96%
Wind Speed SW 13 G 21 mph
Barometer 29.92 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 9 Mar 11:15 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 63. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 79. South southwest wind 7 to 15 mph, with gusts as high as 25 mph.

    High: 79 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 66. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 66 °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 30 percent chance of showers before 1am. Mostly cloudy, with a low around 35. North northwest wind 9 to 18 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 55. North northwest wind around 6 mph becoming west in the afternoon.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. South wind 5 to 14 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 66. Southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 66 °F

    Mostly Cloudy

  • Friday Night

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

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 63. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 79. South southwest wind 7 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 66. South southwest wind around 15 mph, with gusts as high as 25 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 30 percent chance of showers before 1am. Mostly cloudy, with a low around 35. North northwest wind 9 to 18 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 55. North northwest wind around 6 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. South wind 5 to 14 mph, with gusts as high as 24 mph.
Friday
Mostly cloudy, with a high near 66. Southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 42. West southwest wind around 5 mph becoming east northeast after midnight.
Saturday
Sunny, with a high near 71. East southeast wind 6 to 13 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 55. South wind 10 to 13 mph, with gusts as high as 23 mph.
Sunday
A chance of showers. Partly sunny, with a high near 69. South southwest wind 14 to 18 mph becoming west in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 32. Northwest wind 13 to 16 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 45. North northwest wind around 11 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
7:51 pm CDT Mar 9, 2026
Forecast Valid:
11pm CDT Mar 9, 2026-6pm CDT Mar 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