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

64°F

18°C

Humidity 83%
Wind Speed NE 9 mph
Barometer 30.10 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 20 May 5:45 pm CDT
Extended Forecast for

3 Miles NNE Vienna IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 74. Northeast wind 3 to 7 mph.

    High: 74 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Increasing clouds, with a low around 59. East northeast wind 3 to 6 mph.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 76. Light and variable wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 90%.

    High: 76 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 62. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 62 °F

    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 82 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Light and variable wind.

    High: 80 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming calm in the evening.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 74. Northeast wind 3 to 7 mph.
Thursday Night
A 40 percent chance of showers after 1am. Increasing clouds, with a low around 59. East northeast wind 3 to 6 mph.
Friday
Showers and possibly a thunderstorm. High near 76. Light and variable wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 90%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 62. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Light and variable wind.
Sunday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 63. Calm wind.
Memorial Day
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Calm wind becoming southeast around 6 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light east southeast wind.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 82. Calm wind becoming south 5 to 7 mph in the morning.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light southeast wind.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Vienna IL
 37.44°N 88.88°W
Last Update:
4:51 pm CDT May 20, 2026
Forecast Valid:
6pm CDT May 20, 2026-6pm CDT May 27, 2026
 
Forecast Discussion
 
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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