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

28°F

-2°C

Humidity 64%
Wind Speed NW 17 G 30 mph
Barometer 29.96 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 16 Mar 12:45 pm CDT
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: A 20 percent chance of snow showers before 2pm. 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

    Slight Chance
    Snow Showers
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 18. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.

    Low: 18 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. Northwest wind 6 to 8 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow showers after 1am. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. South wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44. South southwest wind around 6 mph.

    Low: 44 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South southwest wind 5 to 7 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. South wind around 5 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76. Southwest wind 5 to 7 mph.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of snow showers before 2pm. Mostly cloudy, with a high near 33. Breezy, with a west northwest wind around 21 mph, with gusts as high as 32 mph.
Tonight
Mostly cloudy, with a low around 18. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 38. Northwest wind 6 to 8 mph.
Tuesday Night
A 30 percent chance of snow showers after 1am. Mostly cloudy, with a low around 31. Light south southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 61. South wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 44. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 72. South southwest wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 48. South wind around 5 mph.
Friday
Mostly sunny, with a high near 76. Southwest wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 54. South southwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 79. Southwest wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 52. Southwest wind around 7 mph.
Sunday
Sunny, with a high near 74. Southwest wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
1:16 pm CDT Mar 16, 2026
Forecast Valid:
1pm CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation