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.

Mostly Cloudy

82°F

28°C

Humidity 74%
Wind Speed SW 9 G 21 mph
Barometer 29.64 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Jun 12:15 am CDT
Extended Forecast for

4 Miles W Vienna IL

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 74. Southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 74 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 4pm. High near 87. West southwest wind around 5 mph becoming light and variable. Chance of precipitation is 80%.

    High: 87 °F

    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. Light north wind.

    Low: 64 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. Light north wind.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. Partly sunny, with a high near 85. South southeast wind 5 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 85 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 70. West southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 70 °F

    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 74. Southwest wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Thursday
Showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 4pm. High near 87. West southwest wind around 5 mph becoming light and variable. Chance of precipitation is 80%.
Thursday Night
Partly cloudy, with a low around 64. Light north wind.
Juneteenth
Mostly sunny, with a high near 84. Light north wind.
Friday Night
Partly cloudy, with a low around 63. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light and variable wind.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Calm wind.
Sunday
Showers and possibly a thunderstorm. Partly sunny, with a high near 85. South southeast wind 5 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Sunday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 70. West southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. West southwest wind around 9 mph becoming north in the afternoon.
Monday Night
Partly cloudy, with a low around 64. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. East northeast wind 3 to 5 mph.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 84. Light north northwest wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Vienna IL
 37.4°N 88.97°W
Last Update:
10:56 pm CDT Jun 17, 2026
Forecast Valid:
12am CDT Jun 18, 2026-6pm CDT Jun 24, 2026
 
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Additional Resources

Radar & Satellite Image

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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