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

84°F

29°C

Humidity 41%
Wind Speed NE 5 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 1 Oct 4:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 61. East wind around 6 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.

    High: 90 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. Light south wind.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. Light south wind.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Calm wind becoming south southeast 5 to 8 mph in the morning.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59. South southeast wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 5 to 10 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. South southeast wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 61. East wind around 6 mph becoming calm in the evening.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 63. Light south wind.
Friday
Sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the morning.
Friday Night
Clear, with a low around 59. Light south wind.
Saturday
Sunny, with a high near 87. Calm wind becoming south southeast 5 to 8 mph in the morning.
Saturday Night
Clear, with a low around 59. South southeast wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 87. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 63. South southeast wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 87. Calm wind becoming south around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 62. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 58. West wind around 6 mph becoming light and variable.
Wednesday
Mostly sunny, with a high near 77. North northeast wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
4:31 pm CDT Oct 1, 2025
Forecast Valid:
5pm CDT Oct 1, 2025-6pm CDT Oct 8, 2025
 
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Additional Resources

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Chance of Precipitation