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

70°F

21°C

Humidity 41%
Wind Speed S 10 mph
Barometer 30.22 in (1023.7 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 8 Apr 12:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 73. South wind 6 to 10 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. South wind 6 to 8 mph.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56. South wind 6 to 8 mph.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 8 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. North northwest wind around 5 mph becoming light and variable. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. East northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

    High: 75 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. East southeast wind 3 to 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 80. South wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 80 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 73. South wind 6 to 10 mph.
Tonight
Mostly clear, with a low around 54. South wind 6 to 8 mph.
Thursday
Sunny, with a high near 77. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 56. South wind 6 to 8 mph.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 8 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. North northwest wind around 5 mph becoming light and variable. Chance of precipitation is 40%.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. East northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 59. East southeast wind 3 to 6 mph.
Sunday
Mostly cloudy, with a high near 80. South wind 7 to 16 mph, with gusts as high as 24 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind 11 to 15 mph, with gusts as high as 26 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 28 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 79. South southwest wind 14 to 18 mph, with gusts as high as 25 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:
12:52 pm CDT Apr 8, 2026
Forecast Valid:
1pm CDT Apr 8, 2026-6pm CDT Apr 14, 2026
 
Forecast Discussion
 
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Additional Resources

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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