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

89°F

32°C

Humidity 31%
Wind Speed W 10 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 7 Oct 3:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. West wind around 10 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. West southwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Light north wind.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 56. Calm wind.

    Low: 56 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming south southeast 5 to 8 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. South southeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 85. Light south southeast wind becoming southeast 6 to 11 mph in the morning.

    High: 85 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 58. East wind 7 to 10 mph.

    Low: 58 °F

    Showers

  • Sunday

    Sunday: A slight chance of showers before 1pm. Partly sunny, with a high near 77. East northeast wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 77 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 88. West wind around 10 mph.
Tonight
Mostly clear, with a low around 57. West southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Light north wind.
Thursday Night
Clear, with a low around 56. Calm wind.
Friday
Sunny, with a high near 89. Calm wind becoming south southeast 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 59. South southeast wind around 5 mph becoming calm in the evening.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 85. Light south southeast wind becoming southeast 6 to 11 mph in the morning.
Saturday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 58. East wind 7 to 10 mph.
Sunday
A slight chance of showers before 1pm. Partly sunny, with a high near 77. East northeast wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 57. Calm wind.
Columbus Day
Mostly sunny, with a high near 86. Light southwest wind increasing to 6 to 11 mph in the afternoon.
Monday Night
Mostly clear, with a low around 57. South southwest wind 7 to 9 mph.
Tuesday
Mostly sunny, with a high near 75. West wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.
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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:
1:50 pm CDT Oct 7, 2026
Forecast Valid:
4pm CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation