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

54°F

12°C

Humidity 28%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 16 Nov 4:45 pm CST
Extended Forecast for

5 Miles S Marion IL

  • Tonight

    Tonight: Clear, with a low around 35. North wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 5pm. Increasing clouds, with a high near 61. Light east wind becoming southeast 5 to 9 mph in the morning.

    High: 61 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, then showers and possibly a thunderstorm after 9pm. Low around 49. Southeast wind 6 to 9 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 71. South southwest wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 53. South southwest wind around 6 mph becoming light and variable in the evening.

    Low: 53 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 70. West wind 3 to 6 mph.

    High: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South wind 5 to 9 mph.

    High: 69 °F

    Showers

  • Thursday Night

    Thursday Night: Showers. Mostly cloudy, with a low around 57. South wind 7 to 10 mph.

    Low: 57 °F

    Showers

Detailed Forecast

Tonight
Clear, with a low around 35. North wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers after 5pm. Increasing clouds, with a high near 61. Light east wind becoming southeast 5 to 9 mph in the morning.
Monday Night
Showers likely, then showers and possibly a thunderstorm after 9pm. Low around 49. Southeast wind 6 to 9 mph. Chance of precipitation is 80%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 71. South southwest wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tuesday Night
A 40 percent chance of showers before midnight. Mostly cloudy, with a low around 53. South southwest wind around 6 mph becoming light and variable in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 70. West wind 3 to 6 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 69. South wind 5 to 9 mph.
Thursday Night
Showers. Mostly cloudy, with a low around 57. South wind 7 to 10 mph.
Friday
Showers likely, mainly before noon. Partly sunny, with a high near 69. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 47. South southwest wind 5 to 7 mph becoming west after midnight.
Saturday
A slight chance of showers. Partly sunny, with a high near 58. West wind 3 to 8 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 41. Light west northwest wind.
Sunday
A slight chance of showers. Mostly sunny, with a high near 59. West wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Marion IL
 37.65°N 88.95°W
Last Update:
3:16 pm CST Nov 16, 2025
Forecast Valid:
5pm CST Nov 16, 2025-6pm CST Nov 23, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation