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

27°F

-3°C

Humidity 69%
Wind Speed W 17 G 30 mph
Barometer 29.95 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 16 Mar 11:45 am CDT
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: A slight chance of snow showers between 1pm and 2pm. Mostly cloudy, with a high near 35. Breezy, with a west northwest wind around 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 35 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 17. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39. Northwest wind 5 to 8 mph.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow showers, mainly 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

    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 43. South southwest wind around 6 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72. South southwest wind 5 to 8 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46. Southwest wind around 5 mph becoming light and variable after midnight.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 74. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of snow showers between 1pm and 2pm. Mostly cloudy, with a high near 35. Breezy, with a west northwest wind around 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 17. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 39. Northwest wind 5 to 8 mph.
Tuesday Night
A 30 percent chance of snow showers, mainly 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 43. South southwest wind around 6 mph.
Thursday
Sunny, with a high near 72. South southwest wind 5 to 8 mph.
Thursday Night
Mostly clear, with a low around 46. Southwest wind around 5 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 74. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 53. Southwest wind around 6 mph.
Saturday
Sunny, with a high near 78. West wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 52. Southwest wind 6 to 8 mph.
Sunday
Sunny, with a high near 74. South wind 8 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
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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:
11:16 am CDT Mar 16, 2026
Forecast Valid:
12pm CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation