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

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

62°F

17°C

Humidity 96%
Wind Speed Calm
Barometer 30.03 in (1017.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 11:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 67. Calm wind.

    Low: 67 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 85. Light and variable wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%.

    High: 85 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 68. South southwest wind 10 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    Low: 68 °F

    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 80. Northwest wind around 10 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 62. North wind 5 to 8 mph becoming calm in the evening.

    Low: 62 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. Light north northeast wind.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 67. Calm wind.
Saturday
Mostly sunny, with a high near 86. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 67. Calm wind.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 85. Light and variable wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 68. South southwest wind 10 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Monday
A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 80. Northwest wind around 10 mph. Chance of precipitation is 30%.
Monday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 62. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 81. Light north northeast wind.
Tuesday Night
Mostly clear, with a low around 63. Calm wind.
Wednesday
Sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 63. Light north wind.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Light and variable wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Calm wind becoming south southeast around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.33°N 88.91°W
Last Update:
8:46 pm CDT Jun 19, 2026
Forecast Valid:
12am CDT Jun 20, 2026-6pm CDT Jun 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