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.

34°F

1°C

Humidity 70%
Wind Speed S 12 mph
Barometer 30.10 in (1020.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 18 Mar 7:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 61. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 61 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 42. South wind 3 to 5 mph.

    Low: 42 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 71. Light and variable wind becoming south around 6 mph in the morning.

    High: 71 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. Southwest wind 3 to 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. West wind 3 to 6 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 55. South southwest wind 5 to 8 mph.

    Low: 55 °F

    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 79. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 61. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tonight
Increasing clouds, with a low around 42. South wind 3 to 5 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 71. Light and variable wind becoming south around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 48. Calm wind.
Friday
Sunny, with a high near 76. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
Partly cloudy, with a low around 53. Southwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 77. West wind 3 to 6 mph.
Saturday Night
Clear, with a low around 55. South southwest wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 79. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 39. North northeast wind around 14 mph, with gusts as high as 22 mph.
Monday
Partly sunny, with a high near 54. Northeast wind 11 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 35. East northeast wind around 7 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 58. East wind 6 to 8 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:
6:01 am CDT Mar 18, 2026
Forecast Valid:
8am CDT Mar 18, 2026-6pm CDT Mar 24, 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