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

36°F

2°C

Humidity 93%
Wind Speed Calm
Barometer 30.00 in (1016.3 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 17 Feb 3:56 am CST
Extended Forecast for

4 Miles ESE Mount Vernon IL

  • Today

    Today: Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a high near 63. South wind 6 to 16 mph, with gusts as high as 28 mph.

    High: 63 °F

    Patchy Fog
    then Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 55. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 33 mph.

    Low: 55 °F

    Breezy.
    Cloudy then
    Slight Chance
    Rain

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Southwest wind 6 to 16 mph, with gusts as high as 28 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 53. South wind around 6 mph.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 69. South southwest wind 6 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39. West wind around 10 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 52. West wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. Northwest wind 3 to 5 mph.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain and snow showers, mainly after noon. Mostly sunny, with a high near 46. North northwest wind 5 to 9 mph.

    High: 46 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a high near 63. South wind 6 to 16 mph, with gusts as high as 28 mph.
Tonight
A 20 percent chance of rain after 5am. Mostly cloudy, with a low around 55. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 33 mph.
Wednesday
Mostly sunny, with a high near 72. Southwest wind 6 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 53. South wind around 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 69. South southwest wind 6 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39. West wind around 10 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 52. West wind 7 to 14 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 32. Northwest wind 3 to 5 mph.
Saturday
A chance of rain and snow showers, mainly after noon. Mostly sunny, with a high near 46. North northwest wind 5 to 9 mph.
Saturday Night
A slight chance of rain and snow showers before midnight. Partly cloudy, with a low around 26. Northwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 40. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 20. North northwest wind around 7 mph.
Monday
Sunny, with a high near 39. North northwest wind 5 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Mount Vernon IL
 38.29°N 88.86°W
Last Update:
3:16 am CST Feb 17, 2026
Forecast Valid:
4am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation