National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

73°F

23°C

Humidity 78%
Wind Speed NE 8 mph
Barometer 29.92 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Sep 4:15 am CDT
Extended Forecast for

Vienna IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.

    High: 88 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A 20 percent chance of showers after 4am. Increasing clouds, with a low around 64. North northeast wind 3 to 6 mph.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 10 percent chance of showers before 7am. Partly sunny, with a high near 80. North northeast wind 6 to 8 mph.

    High: 80 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. North northeast wind 3 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. North wind 6 to 8 mph.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. North northeast wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 78. North northeast wind 3 to 7 mph.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. Light north northeast wind.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming northeast 5 to 7 mph in the morning.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.
Tonight
A 20 percent chance of showers after 4am. Increasing clouds, with a low around 64. North northeast wind 3 to 6 mph.
Tuesday
A 10 percent chance of showers before 7am. Partly sunny, with a high near 80. North northeast wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 58. North northeast wind 3 to 8 mph.
Wednesday
Mostly sunny, with a high near 78. North wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 55. North northeast wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 78. North northeast wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 56. Light north northeast wind.
Friday
Mostly sunny, with a high near 78. Calm wind becoming northeast 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 54. Light northeast wind.
Saturday
Mostly sunny, with a high near 77. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55. Calm wind.
Sunday
Mostly sunny, with a high near 83. Light northeast wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.88°W
Last Update:
2:41 am CDT Sep 21, 2026
Forecast Valid:
4am CDT Sep 21, 2026-6pm CDT Sep 27, 2026
 
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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