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

69°F

21°C

Humidity 69%
Wind Speed S 5 mph
Barometer 30.20 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 3 Oct 9:55 pm CDT
Extended Forecast for

Vienna IL

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, clear, with a low around 60. Calm wind.

    Low: 60 °F

    Clear then
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 85. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. Calm wind.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers. Mostly sunny, with a high near 83. Calm wind becoming south southeast around 5 mph.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.

    High: 81 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 59. North northeast wind 3 to 6 mph.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, clear, with a low around 60. Calm wind.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 85. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Saturday Night
Clear, with a low around 57. Calm wind.
Sunday
Sunny, with a high near 85. Calm wind becoming south southeast 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 65. Calm wind.
Monday
A 30 percent chance of showers. Mostly sunny, with a high near 83. Calm wind becoming south southeast around 5 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Calm wind.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 59. North northeast wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 76. Northeast wind 7 to 9 mph.
Wednesday Night
Mostly clear, with a low around 54. Northeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 75. East northeast wind around 6 mph.
Thursday Night
Mostly clear, with a low around 52. Calm wind.
Friday
Sunny, with a high near 77. Calm wind becoming south around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna IL
 37.42°N 88.88°W
Last Update:
9:01 pm CDT Oct 3, 2025
Forecast Valid:
10pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
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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