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.

Fair

N/A

Humidity NA
Wind Speed Calm
Barometer 29.98 in
Dewpoint N/A
Visibility 10.00 mi
Last update 19 Aug 7:35 pm CDT
Extended Forecast for

4 Miles NE Vienna IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 73. Light and variable wind.

    Low: 73 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. North northeast wind 5 to 9 mph.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. North northeast wind 3 to 6 mph.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. North northeast wind 5 to 8 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. North northeast wind around 6 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 65. Calm wind.

    Low: 65 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 90. Calm wind becoming north around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64. Light north wind.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 73. Light and variable wind.
Wednesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. North northeast wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 67. North northeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 86. North northeast wind 5 to 8 mph.
Thursday Night
Mostly clear, with a low around 66. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 89. Calm wind becoming north northeast around 5 mph in the afternoon.
Friday Night
Clear, with a low around 65. Calm wind.
Saturday
Sunny, with a high near 90. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. Light north wind.
Sunday
Sunny, with a high near 86. North northwest wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 59. North wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 81. Calm wind becoming north northwest around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 56. Light north wind.
Tuesday
Mostly sunny, with a high near 80. Light north northwest wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Vienna IL
 37.46°N 88.85°W
Last Update:
7:16 pm CDT Aug 19, 2025
Forecast Valid:
7pm CDT Aug 19, 2025-6pm CDT Aug 26, 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