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.

Mostly Cloudy

82°F

28°C

Humidity 42%
Wind Speed S 12 mph
Barometer 30.11 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 4 Oct 3:45 pm CDT
Extended Forecast for

Vienna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. Southeast wind around 6 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 56. Calm wind.

    Low: 56 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the morning.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Light south southeast wind.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Calm wind becoming south southeast around 6 mph in the morning. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am, then showers likely between 1am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 60%.

    Low: 65 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. North wind 3 to 6 mph.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. North northeast wind 6 to 8 mph.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 85. Southeast wind around 6 mph.
Tonight
Clear, with a low around 56. Calm wind.
Sunday
Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 64. Light south southeast wind.
Monday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Calm wind becoming south southeast around 6 mph in the morning. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms before 1am, then showers likely between 1am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. North wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 74. North northeast wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 52. Northeast wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 76. East northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 53. Calm wind.
Friday
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.91°W
Last Update:
3:17 pm CDT Oct 4, 2025
Forecast Valid:
4pm CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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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