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

77°F

25°C

Humidity 74%
Wind Speed W 9 mph
Barometer 29.96 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Oct 9:15 pm CDT
Extended Forecast for

Vienna IL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 50. Light west wind becoming northwest 9 to 14 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 10 percent chance of showers before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 60. Northwest wind 14 to 16 mph, with gusts as high as 26 mph.

    High: 60 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40. North wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 61. North northeast wind 7 to 10 mph.

    High: 61 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 67. Light southeast wind.

    High: 67 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 71. Light south wind.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 50. Light west wind becoming northwest 9 to 14 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 20%.
Friday
A 10 percent chance of showers before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 60. Northwest wind 14 to 16 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 40. North wind 9 to 11 mph, with gusts as high as 22 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 61. North northeast wind 7 to 10 mph.
Saturday Night
Areas of frost after 5am. Otherwise, clear, with a low around 35. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 67. Light southeast wind.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 71. Light south wind.
Monday Night
Partly cloudy, with a low around 43. Calm wind.
Tuesday
Sunny, with a high near 75. Calm wind.
Tuesday Night
Mostly clear, with a low around 46. Calm wind.
Wednesday
Sunny, with a high near 77. Calm wind.
Wednesday Night
Clear, with a low around 47. Calm wind.
Thursday
Sunny, with a high near 80. Light and variable wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.91°W
Last Update:
8:06 pm CDT Oct 15, 2026
Forecast Valid:
9pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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Chance of Precipitation