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

39°F

4°C

Humidity 52%
Wind Speed N 12 mph
Barometer 30.65 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 28 Mar 8:45 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 57. North northeast wind around 6 mph becoming east southeast in the afternoon.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 70. South wind 6 to 14 mph, with gusts as high as 24 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 31 mph.

    High: 83 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. South southwest wind 14 to 16 mph becoming west northwest after midnight. Winds could gust as high as 25 mph.

    Low: 53 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Cloudy, with a high near 63. North northeast wind around 13 mph, with gusts as high as 21 mph.

    High: 63 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 57. North northeast wind around 6 mph becoming east southeast in the afternoon.
Tonight
Mostly clear, with a low around 39. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 70. South wind 6 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 56. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 10 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 31 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. South southwest wind 14 to 16 mph becoming west northwest after midnight. Winds could gust as high as 25 mph.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. Cloudy, with a high near 63. North northeast wind around 13 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of showers. Cloudy, with a low around 45. Northeast wind around 10 mph, with gusts as high as 18 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 59. East northeast wind around 11 mph, with gusts as high as 20 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 47. East wind 6 to 8 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 72. East wind 7 to 10 mph becoming south in the afternoon.
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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:
8:26 am CDT Mar 28, 2026
Forecast Valid:
9am CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation