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

56°F

13°C

Humidity 40%
Wind Speed SW 20 mph
Barometer 29.84 in (1011.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 13 Jan 11:56 am CST
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 61. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 61 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers before 1am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 38. West southwest wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 40%.

    Low: 38 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 33 by 5pm. North northwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 43 °F⇓

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 18. North northwest wind 6 to 14 mph, with gusts as high as 26 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 31. Northwest wind around 6 mph becoming light and variable in the afternoon.

    High: 31 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow showers after midnight. Mostly cloudy, with a low around 23. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 23 mph.

    Low: 23 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Friday

    Friday: Partly sunny, with a high near 44. West wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 44 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. West northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 31. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 31 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 61. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Tonight
A chance of showers before 1am, then a slight chance of showers after 3am. Mostly cloudy, with a low around 38. West southwest wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 33 by 5pm. North northwest wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 18. North northwest wind 6 to 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 31. Northwest wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
A 30 percent chance of snow showers after midnight. Mostly cloudy, with a low around 23. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 23 mph.
Friday
Partly sunny, with a high near 44. West wind 11 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 21. West northwest wind around 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 31. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 11. West northwest wind around 8 mph.
Sunday
Sunny, with a high near 25. West southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 11. Southwest wind 6 to 9 mph.
M.L.King Day
Mostly sunny, with a high near 33. West northwest wind 7 to 13 mph, with gusts as high as 20 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:
11:11 am CST Jan 13, 2026
Forecast Valid:
12pm CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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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