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

59°F

15°C

Humidity 55%
Wind Speed S 9 mph
Barometer 30.11 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 16 Feb 12:47 pm CST
Extended Forecast for

Marion IL

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 62. South wind 7 to 9 mph.

    High: 62 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. South wind 5 to 7 mph.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 60. South wind 7 to 17 mph, with gusts as high as 30 mph.

    High: 60 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. Breezy, with a south wind 17 to 20 mph, with gusts as high as 32 mph.

    Low: 58 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Partly sunny, with a high near 73. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.

    High: 73 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 50. South southwest wind 6 to 8 mph.

    Low: 50 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. South southwest wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers after noon. Mostly sunny, with a high near 57. West wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 57 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Washington's Birthday
Mostly sunny, with a high near 62. South wind 7 to 9 mph.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. South wind 5 to 7 mph.
Tuesday
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 60. South wind 7 to 17 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 58. Breezy, with a south wind 17 to 20 mph, with gusts as high as 32 mph.
Wednesday
Partly sunny, with a high near 73. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 50. South southwest wind 6 to 8 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. South southwest wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43. West wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
A slight chance of showers after noon. Mostly sunny, with a high near 57. West wind 7 to 11 mph, with gusts as high as 18 mph.
Friday Night
A chance of showers. Mostly cloudy, with a low around 35. North northwest wind 3 to 6 mph.
Saturday
A slight chance of showers. Partly sunny, with a high near 52. North northwest wind 5 to 8 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 31. Northwest wind around 7 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 45. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
10:47 am CST Feb 16, 2026
Forecast Valid:
1pm CST Feb 16, 2026-6pm CST Feb 22, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation