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

76°F

24°C

Humidity 36%
Wind Speed S 9 mph
Barometer 30.18 in (1022.1 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 9 Apr 5:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Mostly clear, with a low around 56. South wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 75. South southwest wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Northeast wind 3 to 6 mph. Chance of precipitation is 40%.

    Low: 51 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. East northeast wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • 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 80. South southwest wind 7 to 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 81. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 81 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 56. South wind 7 to 9 mph, with gusts as high as 18 mph.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 75. South southwest wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Northeast wind 3 to 6 mph. Chance of precipitation is 40%.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. 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. Southeast wind around 6 mph.
Sunday
Partly sunny, with a high near 80. South southwest wind 7 to 16 mph, with gusts as high as 25 mph.
Sunday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 81. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 11 to 13 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. South southwest wind 11 to 17 mph, with gusts as high as 24 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South southwest wind around 13 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South southwest wind 13 to 16 mph, with gusts as high as 24 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Southwest wind 7 to 10 mph.
Thursday
A chance of showers. Partly sunny, with a high near 79. Southwest wind 7 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
5:26 pm CDT Apr 9, 2026
Forecast Valid:
6pm CDT Apr 9, 2026-6pm CDT Apr 16, 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