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

47°F

8°C

Humidity 90%
Wind Speed Calm
Barometer 30.19 in (1022.5 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 9 Apr 12:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Clear, with a steady temperature around 57. South wind around 8 mph.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 77. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 77 °F

    Sunny

  • Thursday Night

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

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 75. South southwest wind 8 to 10 mph becoming west northwest 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 53. North wind around 5 mph becoming light and variable. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. East northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Southeast wind around 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 81. South southwest wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 81 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a steady temperature around 57. South wind around 8 mph.
Thursday
Sunny, with a high near 77. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 56. South wind 6 to 8 mph.
Friday
A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 75. South southwest wind 8 to 10 mph becoming west northwest 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 53. North wind around 5 mph becoming light and variable. Chance of precipitation is 40%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. East northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 59. Southeast wind around 6 mph.
Sunday
Partly sunny, with a high near 81. South southwest wind 7 to 16 mph, with gusts as high as 26 mph.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 25 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South southwest wind 11 to 15 mph, with gusts as high as 22 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:
1:21 am CDT Apr 9, 2026
Forecast Valid:
1am CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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