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 and Breezy

46°F

8°C

Humidity 93%
Wind Speed N 23 mph
Barometer 29.98 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 11 Mar 4:45 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 32. Breezy, with a north northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.

    Low: 32 °F

    Cloudy and
    Breezy then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 54. Light and variable wind becoming west northwest 5 to 7 mph in the morning.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 28 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. Northwest wind around 6 mph becoming light and variable.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65. East northeast wind 6 to 9 mph becoming southeast in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52. East southeast wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 52 °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 23 mph, with gusts as high as 36 mph.

    High: 71 °F

    Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Rain showers likely before 1am, then a slight chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 31 mph.

    Low: 27 °F

    Showers
    Likely and
    Breezy then
    Rain/Snow
    Likely and
    Blustery

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 32. Breezy, with a north northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.
Thursday
Sunny, with a high near 54. Light and variable wind becoming west northwest 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 42. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 28 mph.
Friday
Mostly sunny, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 37. Northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 65. East northeast wind 6 to 9 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 52. East southeast wind 6 to 9 mph, with gusts as high as 18 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 23 mph, with gusts as high as 36 mph.
Sunday Night
Rain showers likely before 1am, then a slight chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 31 mph.
Monday
Mostly sunny, with a high near 40. Northwest wind around 17 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 19. Northwest wind 5 to 11 mph.
Tuesday
Mostly sunny, with a high near 44. North northwest wind 5 to 8 mph becoming southwest in the afternoon.
Tuesday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 31. South wind 5 to 7 mph.
Wednesday
Mostly cloudy, with a high near 56. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
1:26 pm CDT Mar 11, 2026
Forecast Valid:
5pm CDT Mar 11, 2026-6pm CDT Mar 18, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation