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.

Mostly Cloudy

87°F

31°C

Humidity 35%
Wind Speed NE 5 mph
Barometer 30.12 in (1020.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 29 Sep 3:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 91. East northeast wind around 8 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 61. Light north northeast wind.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. East wind 3 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 87. Calm wind becoming east southeast around 5 mph in the morning.

    High: 87 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60. Light east southeast wind.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the morning.

    High: 87 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 91. East northeast wind around 8 mph.
Tonight
Clear, with a low around 61. Light north northeast wind.
Tuesday
Sunny, with a high near 90. Calm wind becoming northeast 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 57. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 88. East wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 87. Calm wind becoming east southeast around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 60. Light east southeast wind.
Friday
Sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Clear, with a low around 59. South wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 85. Light south wind increasing to 5 to 9 mph in the morning.
Saturday Night
Mostly clear, with a low around 58. South wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 85. Light south southeast wind becoming south 5 to 9 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:
2:16 pm CDT Sep 29, 2025
Forecast Valid:
4pm CDT Sep 29, 2025-6pm CDT Oct 5, 2025
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation