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

64°F

18°C

Humidity 73%
Wind Speed SW 20 mph
Barometer 29.72 in (1006.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Feb 9:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Mostly sunny, with a high near 71. Southwest wind 6 to 10 mph.

    High: 71 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 54. South wind 5 to 7 mph.

    Low: 54 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. South wind 7 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 60%.

    High: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before midnight. Mostly clear, with a low around 40. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 40 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 51. West wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31. Calm wind becoming north around 5 mph after midnight.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of snow showers before noon, then a chance of rain and snow showers. Partly sunny, with a high near 45. North wind 5 to 9 mph. Chance of precipitation is 40%.

    High: 45 °F

    Slight Chance
    Snow Showers
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of snow showers before midnight. Partly cloudy, with a low around 25. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Chance Snow
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 38 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 71. Southwest wind 6 to 10 mph.
Tonight
Increasing clouds, with a low around 54. South wind 5 to 7 mph.
Thursday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. South wind 7 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of rain before midnight. Mostly clear, with a low around 40. West wind 10 to 14 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 51. West wind 6 to 14 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 31. Calm wind becoming north around 5 mph after midnight.
Saturday
A slight chance of snow showers before noon, then a chance of rain and snow showers. Partly sunny, with a high near 45. North wind 5 to 9 mph. Chance of precipitation is 40%.
Saturday Night
A chance of snow showers before midnight. Partly cloudy, with a low around 25. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 20. Northwest wind 7 to 9 mph.
Monday
Sunny, with a high near 37. North northwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 20. Light and variable wind.
Tuesday
Mostly sunny, with a high near 44. Calm wind becoming south 5 to 9 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
10:22 am CST Feb 18, 2026
Forecast Valid:
10am CST Feb 18, 2026-6pm CST Feb 24, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation