National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

69°F

21°C

Humidity 35%
Wind Speed S 20 mph
Barometer 29.89 in (1012.7 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 27 Feb 3:56 pm CST
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. South wind 5 to 9 mph becoming light and variable.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 65. Northeast wind 5 to 9 mph becoming south in the afternoon.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. South wind 6 to 9 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 47. Northeast wind around 10 mph, with gusts as high as 18 mph.

    High: 47 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, possibly mixed with snow showers. Cloudy, with a low around 33. East northeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 33 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 44. East wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 44 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Cloudy, with a low around 39. East wind 5 to 7 mph becoming south southeast after midnight.

    Low: 39 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 60. South southwest wind 7 to 10 mph.

    High: 60 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 69. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 40. South wind 5 to 9 mph becoming light and variable.
Saturday
Sunny, with a high near 65. Northeast wind 5 to 9 mph becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 34. South wind 6 to 9 mph becoming north after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly cloudy, with a high near 47. Northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday Night
Rain likely, possibly mixed with snow showers. Cloudy, with a low around 33. East northeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Monday
A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 44. East wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 39. East wind 5 to 7 mph becoming south southeast after midnight.
Tuesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 60. South southwest wind 7 to 10 mph.
Tuesday Night
Showers likely, with thunderstorms also possible after midnight. Cloudy, with a low around 50. South wind around 8 mph becoming east southeast after midnight.
Wednesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 64. South southeast wind 8 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 53. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 67. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.
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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:
12:56 pm CST Feb 27, 2026
Forecast Valid:
4pm CST Feb 27, 2026-6pm CST Mar 5, 2026
 
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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