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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

35°F

2°C

Humidity 77%
Wind Speed Calm
Barometer 30.33 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 Mar 4:55 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 55. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. Breezy, with a south southwest wind 7 to 12 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 29 mph.

    Low: 42 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 64. Southwest wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. West northwest wind around 6 mph becoming light and variable.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. East northeast wind 7 to 10 mph becoming south southeast in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54. Southeast wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 13 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 60%.

    High: 71 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain and snow showers likely, mainly before 1am. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 21 to 23 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.

    Low: 27 °F

    Rain/Snow
    Likely and
    Breezy

  • Monday

    Monday: Partly sunny, with a high near 38. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 30 mph.

    High: 38 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
Sunny, with a high near 55. Light and variable wind becoming west 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 42. Breezy, with a south southwest wind 7 to 12 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 29 mph.
Friday
Mostly sunny, with a high near 64. Southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 38. West northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 67. East northeast wind 7 to 10 mph becoming south southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 54. Southeast wind 6 to 10 mph, with gusts as high as 21 mph.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 13 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 60%.
Sunday Night
Rain and snow showers likely, mainly before 1am. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 21 to 23 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.
Monday
Partly sunny, with a high near 38. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 18. Northwest wind 6 to 14 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 42. Northwest wind 5 to 7 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 32. Southeast wind around 6 mph.
Wednesday
Mostly cloudy, with a high near 58. South southwest wind 7 to 10 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
4:56 am CDT Mar 12, 2026
Forecast Valid:
5am CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
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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