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.

Overcast

44°F

7°C

Humidity 83%
Wind Speed Vrbl 3 mph
Barometer 30.07 in (1018.7 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 8 Mar 12:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Northwest wind around 5 mph becoming calm.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 64. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. South southwest wind around 6 mph.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after midnight. Mostly clear, with a low around 61. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 78 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 60. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    Low: 60 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Cloudy, with a high near 71. South southwest wind around 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before midnight. Partly cloudy, with a low around 33. Northwest wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Northwest wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 64. Calm wind becoming south southwest 5 to 8 mph in the morning.
Sunday Night
Clear, with a low around 44. South southwest wind around 6 mph.
Monday
Sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
A 20 percent chance of showers after midnight. Mostly clear, with a low around 61. South southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 60. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 71. South southwest wind around 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.
Wednesday Night
A chance of showers before midnight. Partly cloudy, with a low around 33. Northwest wind 13 to 16 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 53. West northwest wind 5 to 14 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 40. Light west southwest wind becoming south 8 to 13 mph in the evening. Winds could gust as high as 23 mph.
Friday
Partly sunny, with a high near 65. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 40. West southwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Saturday
Mostly cloudy, with a high near 58. North northeast wind 7 to 11 mph becoming east southeast in the afternoon. Winds could gust as high as 18 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:
10:36 pm CST Mar 7, 2026
Forecast Valid:
12am CST Mar 8, 2026-6pm CDT Mar 14, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation