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

33°F

1°C

Humidity 61%
Wind Speed W 17 G 24 mph
Barometer 29.85 in (1011.3 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 20 Feb 7:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Sunny, with a high near 44. West wind 12 to 17 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: A slight chance of rain showers before 3am, then a slight chance of snow showers between 3am and 4am, then a slight chance of freezing rain after 4am. Partly cloudy, with a low around 28. Light north wind. Chance of precipitation is 20%.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Wintry
    Mix

  • Saturday

    Saturday: Mostly sunny, with a high near 43. Light north wind becoming northwest 5 to 9 mph in the morning.

    High: 43 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 36. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.

    High: 36 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 17 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 34. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 17. Light and variable wind.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. Light south southwest wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 21 mph.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 44. West wind 12 to 17 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.
Tonight
A slight chance of rain showers before 3am, then a slight chance of snow showers between 3am and 4am, then a slight chance of freezing rain after 4am. Partly cloudy, with a low around 28. Light north wind. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 43. Light north wind becoming northwest 5 to 9 mph in the morning.
Saturday Night
Mostly clear, with a low around 24. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 36. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 17. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 34. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 17. Light and variable wind.
Tuesday
Mostly sunny, with a high near 46. Light south southwest wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 38. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 56. South southwest wind 8 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 34. Southwest wind 5 to 7 mph becoming north northwest after midnight.
Thursday
A slight chance of showers. Mostly sunny, with a high near 52. North northwest wind 5 to 9 mph becoming south in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
6:07 am CST Feb 20, 2026
Forecast Valid:
8am CST Feb 20, 2026-6pm CST Feb 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation