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.

47°F

8°C

Humidity 97%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 14 May 6:56 am CDT
Extended Forecast for

4 Miles SW Mount Vernon IL

  • Today

    Today: Sunny, with a high near 74. Calm wind.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Calm wind becoming south southeast 5 to 7 mph after midnight.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Partly sunny, with a high near 81. South wind 8 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 85 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. South wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 6 to 15 mph, with gusts as high as 21 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 74. Calm wind.
Tonight
Mostly clear, with a low around 53. Calm wind becoming south southeast 5 to 7 mph after midnight.
Friday
A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Partly sunny, with a high near 81. South wind 8 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Friday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 66. South wind 5 to 9 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 89. South wind 6 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 69. South wind 8 to 11 mph, with gusts as high as 22 mph.
Monday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 83. South southwest wind 11 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. South wind 5 to 8 mph becoming northwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Mount Vernon IL
 38.27°N 88.95°W
Last Update:
5:31 am CDT May 14, 2026
Forecast Valid:
7am CDT May 14, 2026-6pm CDT May 20, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation