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

73°F

23°C

Humidity 67%
Wind Speed S 12 mph
Barometer 29.97 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 May 4:35 am CDT
Extended Forecast for

4 Miles NE Vienna IL

  • Today

    Today: Showers and thunderstorms likely, mainly after 3pm. Partly sunny, with a high near 87. South southwest wind 8 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Partly cloudy, with a low around 70. South southeast wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 87. South southwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 62. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%.

    Low: 62 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 74. North wind around 8 mph. Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 56. North northeast wind 5 to 8 mph.

    Low: 56 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North northeast wind around 7 mph.

    High: 76 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. East northeast wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Calm wind becoming southeast around 6 mph in the morning.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 3pm. Partly sunny, with a high near 87. South southwest wind 8 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Partly cloudy, with a low around 70. South southeast wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 87. South southwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%.
Wednesday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 74. North wind around 8 mph. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 56. North northeast wind 5 to 8 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North northeast wind around 7 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. East northeast wind around 6 mph becoming calm in the evening.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Calm wind becoming southeast around 6 mph in the morning.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Light and variable wind.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 84. Calm wind becoming south around 6 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Vienna IL
 37.46°N 88.85°W
Last Update:
1:26 am CDT May 18, 2026
Forecast Valid:
4am CDT May 18, 2026-6pm CDT May 24, 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