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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

4 Miles W Vienna IL

  • Overnight

    Overnight: Clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Southeast wind 5 to 7 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Partly sunny, with a high near 73. South southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 54. South southwest wind around 6 mph becoming calm in the evening.

    Low: 54 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 72. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers 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 57. Light and variable wind. Chance of precipitation is 60%.

    Low: 57 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before noon, then showers likely. Mostly cloudy, with a high near 71. South wind 3 to 8 mph.

    High: 71 °F

    Showers

  • Thursday Night

    Thursday Night: Showers. Mostly cloudy, with a low around 57. South wind 6 to 8 mph.

    Low: 57 °F

    Showers

Detailed Forecast

Overnight
Clear, with a low around 35. Calm wind.
Monday
Sunny, with a high near 63. Calm wind becoming southeast 5 to 7 mph in the morning.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Southeast wind 5 to 7 mph. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Partly sunny, with a high near 73. South southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 54. South southwest wind around 6 mph becoming calm in the evening.
Wednesday
A slight chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 72. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 57. Light and variable wind. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm before noon, then showers likely. Mostly cloudy, with a high near 71. South wind 3 to 8 mph.
Thursday Night
Showers. Mostly cloudy, with a low around 57. South wind 6 to 8 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 light and variable.
Saturday
A slight chance of showers. Partly sunny, with a high near 59. West wind 3 to 7 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 41. Calm wind.
Sunday
A slight chance of showers. Mostly sunny, with a high near 60. Calm wind becoming west around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Vienna IL
 37.4°N 88.97°W
Last Update:
10:31 pm CST Nov 16, 2025
Forecast Valid:
12am CST Nov 17, 2025-6pm CST Nov 23, 2025
 
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