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

47°F

8°C

Humidity 74%
Wind Speed S 6 mph
Barometer 29.90 in (1012.9 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 8 Jan 4:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: A 30 percent chance of showers after 1pm. Patchy fog between 9am and 10am. Otherwise, cloudy, with a high near 66. Breezy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 66 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then a slight chance of showers. Low around 56. Breezy, with a south wind 14 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Showers and
    Breezy then
    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a temperature falling to around 51 by 5pm. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 59 °F⇓

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 42. Calm wind becoming north around 5 mph after midnight.

    Low: 42 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before noon. Partly sunny, with a high near 47. West northwest wind 6 to 15 mph, with gusts as high as 22 mph.

    High: 47 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. West wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 34. West northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 34 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22. West northwest wind around 5 mph becoming calm in the evening.

    Low: 22 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 45. South southwest wind 5 to 10 mph.

    High: 45 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers after 1pm. Patchy fog between 9am and 10am. Otherwise, cloudy, with a high near 66. Breezy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph.
Tonight
Showers and thunderstorms before 3am, then a slight chance of showers. Low around 56. Breezy, with a south wind 14 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.
Friday
Partly sunny, with a temperature falling to around 51 by 5pm. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 42. Calm wind becoming north around 5 mph after midnight.
Saturday
A 20 percent chance of showers before noon. Partly sunny, with a high near 47. West northwest wind 6 to 15 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 25. West wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 34. West northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 22. West northwest wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 45. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 32. Southwest wind around 7 mph.
Tuesday
Mostly sunny, with a high near 53. South southwest wind 6 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 36. South southwest wind around 7 mph becoming west after midnight.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 44. Northwest wind 6 to 9 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:
4:46 am CST Jan 8, 2026
Forecast Valid:
5am CST Jan 8, 2026-6pm CST Jan 14, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation