National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Overcast

59°F

15°C

Humidity 87%
Wind Speed N 7 mph
Barometer 30.18 in (1022.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 May 8:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 1pm. Cloudy, with a high near 66. North northeast wind 5 to 9 mph. Chance of precipitation is 40%.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. Northeast wind 5 to 8 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 73. East northeast wind 7 to 10 mph.

    High: 73 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 58. East northeast wind 6 to 8 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 74. East northeast wind around 7 mph becoming southeast in the afternoon. Chance of precipitation is 90%.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 62. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Southwest wind 3 to 5 mph.

    High: 81 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 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

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Light and variable wind.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 1pm. Cloudy, with a high near 66. North northeast wind 5 to 9 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, with a low around 54. Northeast wind 5 to 8 mph.
Thursday
Partly sunny, with a high near 73. East northeast wind 7 to 10 mph.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 58. East northeast wind 6 to 8 mph. Chance of precipitation is 50%.
Friday
Showers and possibly a thunderstorm. High near 74. East northeast wind around 7 mph becoming southeast in the afternoon. Chance of precipitation is 90%.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 62. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Southwest wind 3 to 5 mph.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Light and variable wind.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind.
Memorial Day
Showers and thunderstorms likely. Mostly cloudy, with a high near 81. Calm wind becoming east southeast around 6 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light southeast wind.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Calm wind becoming south southeast 5 to 8 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
8:41 am CDT May 20, 2026
Forecast Valid:
9am CDT May 20, 2026-6pm CDT May 26, 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