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.

Partly Cloudy and Breezy

79°F

26°C

Humidity 52%
Wind Speed SW 24 G 32 mph
Barometer 29.99 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 30 Mar 2:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. South wind 9 to 13 mph, with gusts as high as 29 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 82 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers, mainly after 1am. Increasing clouds, with a low around 63. South southwest wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely. Mostly cloudy, with a high near 77. South southwest wind 6 to 10 mph. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 65. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    High: 79 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 62. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.

    Low: 62 °F

    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 79. South wind 9 to 13 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 63. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
A 40 percent chance of showers, mainly after 1am. Increasing clouds, with a low around 63. South southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Wednesday
Showers likely. Mostly cloudy, with a high near 77. South southwest wind 6 to 10 mph. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 65. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Thursday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 62. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South wind around 11 mph, with gusts as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. South wind 11 to 17 mph, with gusts as high as 23 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 42. West northwest wind around 14 mph, with gusts as high as 21 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 58. West northwest wind 13 to 15 mph, with gusts as high as 21 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:
3:12 pm CDT Mar 30, 2026
Forecast Valid:
3pm CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation