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

63°F

17°C

Humidity 52%
Wind Speed S 17 G 29 mph
Barometer 30.29 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 9 Apr 7:35 am CDT
Extended Forecast for

Vienna IL

  • Today

    Today: Sunny, with a high near 78. South southwest wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. South wind 3 to 5 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. Calm wind becoming southeast around 5 mph.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 83. Light south wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 26 mph.

    High: 83 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 22 mph.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. South southwest wind 10 to 15 mph, with gusts as high as 28 mph.

    High: 81 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 78. South southwest wind 8 to 10 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 53. South wind 3 to 5 mph.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 57. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. Calm wind becoming southeast around 5 mph.
Saturday Night
Partly cloudy, with a low around 59. Calm wind.
Sunday
Partly sunny, with a high near 83. Light south wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 26 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 22 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. South southwest wind 10 to 15 mph, with gusts as high as 28 mph.
Monday Night
Mostly cloudy, with a low around 68. South southwest wind around 10 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 9 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. South southwest wind 9 to 11 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.91°W
Last Update:
4:41 am CDT Apr 9, 2026
Forecast Valid:
9am CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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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