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.

Partly Cloudy

57°F

14°C

Humidity 31%
Wind Speed S 14 mph
Barometer 30.31 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 9:45 am CDT
Extended Forecast for

4 Miles W Vienna IL

  • Today

    Today: Mostly sunny, with a high near 71. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 71 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 56. South wind around 8 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. South southwest wind 9 to 18 mph, with gusts as high as 30 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. South wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 33 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Southwest wind 8 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 71. West wind 7 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 55. East northeast wind around 8 mph becoming southeast after midnight.

    Low: 55 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 71. South southeast wind 7 to 9 mph, with gusts as high as 18 mph.

    High: 71 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 71. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 56. South wind around 8 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 9 to 18 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 65. South wind 10 to 13 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 83. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 33 mph.
Tuesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Southwest wind 8 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Wednesday
Showers and possibly a thunderstorm. High near 71. West wind 7 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 55. East northeast wind around 8 mph becoming southeast after midnight.
Thursday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 71. South southeast wind 7 to 9 mph, with gusts as high as 18 mph.
Thursday Night
Showers likely. Cloudy, with a low around 53. South southwest wind around 7 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 76. South wind 6 to 8 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind around 7 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. South southwest wind 9 to 13 mph, with gusts as high as 21 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:
9:16 am CDT Mar 29, 2026
Forecast Valid:
10am CDT Mar 29, 2026-6pm CDT Apr 4, 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