National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

77°F

25°C

Humidity 32%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 6 Oct 3:47 pm CDT
Extended Forecast for

3 Miles SE Marion IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 77. Light south southeast wind.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 51. Calm wind.

    Low: 51 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming west southwest 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South southwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Light north northeast wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming east 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Light east southeast wind.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 77. Light south southeast wind.
Tonight
Clear, with a low around 51. Calm wind.
Wednesday
Sunny, with a high near 85. Calm wind becoming west southwest 5 to 7 mph in the morning.
Wednesday Night
Mostly clear, with a low around 57. South southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 53. Light north northeast wind.
Friday
Sunny, with a high near 83. Calm wind becoming east 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 57. Light east southeast wind.
Saturday
Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East southeast wind around 7 mph.
Sunday
A chance of showers. Partly sunny, with a high near 76. East wind 6 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 56. Light west northwest wind.
Columbus Day
Partly sunny, with a high near 81. Calm wind becoming north northwest 5 to 8 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Marion IL
 37.71°N 88.89°W
Last Update:
1:16 pm CDT Oct 6, 2026
Forecast Valid:
4pm CDT Oct 6, 2026-6pm CDT Oct 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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