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.

Overcast

40°F

4°C

Humidity 68%
Wind Speed NW 10 G 20 mph
Barometer 29.82 in (1010.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 14 Jan 8:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 30 by 5pm. North northwest wind 10 to 17 mph, with gusts as high as 31 mph.

    High: 42 °F⇓

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 18. North northwest wind 7 to 13 mph, with gusts as high as 28 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 32. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. Light south southwest wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 23 mph.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Friday

    Friday: Partly sunny, with a high near 44. West wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 44 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28. West northwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9. Northwest wind around 7 mph.

    Low: 9 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 25. West southwest wind 7 to 10 mph.

    High: 25 °F

    Mostly Sunny

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 30 by 5pm. North northwest wind 10 to 17 mph, with gusts as high as 31 mph.
Tonight
Mostly clear, with a low around 18. North northwest wind 7 to 13 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 32. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Thursday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. Light south southwest wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 23 mph.
Friday
Partly sunny, with a high near 44. West wind 10 to 15 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 20. West wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 28. West northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 9. Northwest wind around 7 mph.
Sunday
Mostly sunny, with a high near 25. West southwest wind 7 to 10 mph.
Sunday Night
Partly cloudy, with a low around 14. West southwest wind 7 to 10 mph, with gusts as high as 20 mph.
M.L.King Day
Mostly sunny, with a high near 31. West wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 12. West northwest wind 5 to 7 mph.
Tuesday
Sunny, with a high near 33. West wind 5 to 8 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:
8:17 am CST Jan 14, 2026
Forecast Valid:
9am CST Jan 14, 2026-6pm CST Jan 20, 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