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.

Fog/Mist

65°F

18°C

Humidity 97%
Wind Speed Calm
Barometer 30.05 in (1017.6 mb)
Dewpoint 64°F (18°C)
Visibility 6.00 mi
Last update 22 Aug 10:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 60. Light north northwest wind.

    Low: 60 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 80. North northwest wind 5 to 11 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 78. Light north northwest wind becoming northwest 5 to 10 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 52. North northwest wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 78. Calm wind becoming north northwest 5 to 7 mph in the morning.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 51. Light north wind.

    Low: 51 °F

    Clear

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 62. Calm wind.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 60. Light north northwest wind.
Sunday
Sunny, with a high near 80. North northwest wind 5 to 11 mph.
Sunday Night
Mostly clear, with a low around 55. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 78. Light north northwest wind becoming northwest 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 52. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 78. Calm wind becoming north northwest 5 to 7 mph in the morning.
Tuesday Night
Clear, with a low around 51. Light north wind.
Wednesday
Sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 54. Calm wind.
Thursday
Sunny, with a high near 83. Light south southwest wind.
Thursday Night
Partly cloudy, with a low around 57. Calm wind.
Friday
A slight chance of showers. Mostly sunny, with a high near 84. Calm wind becoming east 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
10:16 pm CDT Aug 22, 2025
Forecast Valid:
11pm CDT Aug 22, 2025-6pm CDT Aug 29, 2025
 
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Additional Resources

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Chance of Precipitation