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

45°F

7°C

Humidity 57%
Wind Speed E 6 mph
Barometer 30.13 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 14 Mar 8:47 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 68. East wind 6 to 11 mph becoming south southeast in the afternoon. Winds could gust as high as 18 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. Southeast wind 7 to 14 mph, with gusts as high as 25 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 18 to 28 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.

    High: 72 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 26. Breezy, with a south wind 21 to 23 mph becoming west northwest after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 100%.

    Low: 26 °F

    Breezy.
    Showers then
    Rain/Snow

  • Monday

    Monday: Mostly cloudy, with a high near 33. Breezy, with a west northwest wind around 21 mph, with gusts as high as 32 mph.

    High: 33 °F

    Mostly Cloudy
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16. West northwest wind 8 to 17 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 39. West northwest wind around 7 mph.

    High: 39 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 28. Light south wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 22 mph.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 60. South wind 14 to 16 mph, with gusts as high as 26 mph.

    High: 60 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 68. East wind 6 to 11 mph becoming south southeast in the afternoon. Winds could gust as high as 18 mph.
Tonight
Partly cloudy, with a low around 55. Southeast wind 7 to 14 mph, with gusts as high as 25 mph.
Sunday
Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 18 to 28 mph, with gusts as high as 43 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 26. Breezy, with a south wind 21 to 23 mph becoming west northwest after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 100%.
Monday
Mostly cloudy, with a high near 33. Breezy, with a west northwest wind around 21 mph, with gusts as high as 32 mph.
Monday Night
Partly cloudy, with a low around 16. West northwest wind 8 to 17 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 39. West northwest wind around 7 mph.
Tuesday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 28. Light south wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 22 mph.
Wednesday
Partly sunny, with a high near 60. South wind 14 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 41. South southwest wind 5 to 8 mph.
Thursday
Sunny, with a high near 71. Southwest wind around 6 mph.
Thursday Night
Partly cloudy, with a low around 48. South wind 3 to 5 mph.
Friday
Sunny, with a high near 71. Southwest wind 6 to 9 mph becoming west northwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
1:26 am CDT Mar 14, 2026
Forecast Valid:
8am CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation