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.

Fair

68°F

20°C

Humidity 74%
Wind Speed S 12 G 17 mph
Barometer 29.89 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 2 Apr 4:55 am CDT
Extended Forecast for

Marion IL

Wind Advisory April 2, 10:00am until April 2, 07:00pm
Click here for hazard details and duration
Wind Advisory

  • Today

    Today: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 80. Breezy, with a south wind 14 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 60%.

    High: 80 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 65. South southwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 83. South southwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 4pm, then showers likely. High near 69. South southwest wind around 11 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 42. West northwest wind 6 to 9 mph.

    Low: 42 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 61. Northwest wind 6 to 10 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 38. North northwest wind around 6 mph becoming calm in the evening.

    Low: 38 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 66. Calm wind becoming north northwest 5 to 7 mph in the morning.

    High: 66 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 80. Breezy, with a south wind 14 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 60%.
Tonight
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 65. South southwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 83. South southwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday
Showers and possibly a thunderstorm before 4pm, then showers likely. High near 69. South southwest wind around 11 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 42. West northwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 61. Northwest wind 6 to 10 mph.
Sunday Night
Clear, with a low around 38. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 66. Calm wind becoming north northwest 5 to 7 mph in the morning.
Monday Night
Partly cloudy, with a low around 43. North wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 62. Northeast wind 6 to 9 mph.
Tuesday Night
Mostly clear, with a low around 40. East wind around 7 mph.
Wednesday
Mostly sunny, with a high near 69. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
2:56 am CDT Apr 2, 2026
Forecast Valid:
5am CDT Apr 2, 2026-6pm CDT Apr 8, 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