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

68°F

20°C

Humidity 70%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 2 Aug 7:55 pm CDT
Extended Forecast for

Vienna IL

  • Tonight

    Tonight: Mostly clear, with a low around 61. Light north northeast wind.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83. North northeast wind 3 to 8 mph.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. Light east northeast wind.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Light east southeast wind.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Light north northeast wind.
Sunday
Mostly sunny, with a high near 83. North northeast wind 3 to 8 mph.
Sunday Night
Partly cloudy, with a low around 67. Light east northeast wind.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Light east southeast wind.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 40%.
Tuesday Night
Mostly clear, with a low around 68. Calm wind.
Wednesday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Sunny, with a high near 88. Light southeast wind.
Thursday Night
Mostly clear, with a low around 69. Calm wind.
Friday
Sunny, with a high near 90. Calm wind becoming south around 5 mph.
Friday Night
Mostly clear, with a low around 72. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 91. Calm wind becoming south around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.88°W
Last Update:
6:32 pm CDT Aug 2, 2025
Forecast Valid:
8pm CDT Aug 2, 2025-6pm CDT Aug 9, 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