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

72°F

22°C

Humidity 53%
Wind Speed E 12 mph
Barometer 30.06 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 10 Oct 1:45 pm CDT
Extended Forecast for

Marion IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 75. East wind around 8 mph.

    High: 75 °F

    Cloudy

  • Tonight

    Tonight: A 40 percent chance of showers, mainly before 9pm. Mostly cloudy, with a low around 55. East northeast wind 5 to 10 mph becoming light north northeast after midnight.

    Low: 55 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 83. North northwest wind 3 to 7 mph.

    High: 83 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 91. Light south southwest wind becoming southwest 8 to 13 mph in the morning.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 65. South southwest wind 6 to 8 mph.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Southwest wind 7 to 11 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. South southwest wind 5 to 7 mph.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 87. Southwest wind 5 to 9 mph becoming north in the afternoon.

    High: 87 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Cloudy, with a high near 75. East wind around 8 mph.
Tonight
A 40 percent chance of showers, mainly before 9pm. Mostly cloudy, with a low around 55. East northeast wind 5 to 10 mph becoming light north northeast after midnight.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 83. North northwest wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 61. Light south wind.
Columbus Day
Sunny, with a high near 91. Light south southwest wind becoming southwest 8 to 13 mph in the morning.
Monday Night
Clear, with a low around 65. South southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 92. Southwest wind 7 to 11 mph.
Tuesday Night
Mostly clear, with a low around 68. South southwest wind 5 to 7 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 87. Southwest wind 5 to 9 mph becoming north in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 3 to 6 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. East southeast wind 7 to 11 mph becoming south southwest in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. South southwest wind 6 to 9 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 73. West northwest wind 7 to 15 mph, with gusts as high as 22 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
1:26 pm CDT Oct 10, 2026
Forecast Valid:
2pm CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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