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.

Fair

77°F

25°C

Humidity 37%
Wind Speed E 10 mph
Barometer 30.06 in (1018.1 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 10 Oct 1:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 77. East southeast wind around 9 mph.

    High: 77 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. East wind 5 to 8 mph becoming calm after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 60. Calm wind.

    Low: 60 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 93. Light south southwest wind becoming southwest 9 to 14 mph in the morning.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 65. Southwest wind 7 to 9 mph.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Southwest wind 7 to 13 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. Southwest wind 5 to 8 mph.

    Low: 67 °F

    Clear then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. West wind 5 to 9 mph becoming north in the afternoon.

    High: 86 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Cloudy, with a high near 77. East southeast wind around 9 mph.
Tonight
Mostly cloudy, with a low around 56. East wind 5 to 8 mph becoming calm after midnight.
Sunday
Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 60. Calm wind.
Columbus Day
Sunny, with a high near 93. Light south southwest wind becoming southwest 9 to 14 mph in the morning.
Monday Night
Clear, with a low around 65. Southwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 94. Southwest wind 7 to 13 mph.
Tuesday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. Southwest wind 5 to 8 mph.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. West wind 5 to 9 mph becoming north in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. East northeast wind 5 to 7 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 80. East wind 8 to 14 mph becoming south in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. South southwest wind 6 to 13 mph becoming west after midnight.
Friday
A slight chance of showers. Partly sunny, with a high near 72. Breezy, with a west northwest wind 10 to 20 mph.
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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:
1:26 pm CDT Oct 10, 2026
Forecast Valid:
2pm CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation