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

37°F

3°C

Humidity 73%
Wind Speed Calm
Barometer 30.39 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 23 Mar 8:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. East northeast wind around 6 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. East southeast wind around 6 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. East southeast wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 43. South southwest wind around 17 mph becoming north northeast after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 51. North wind around 17 mph, with gusts as high as 25 mph.

    High: 51 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 32. North wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. East northeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 61. East southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 42. East southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 72. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 61. South wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 43. South southwest wind around 17 mph becoming north northeast after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%.
Friday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 51. North wind around 17 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 32. North wind 8 to 13 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 56. Northeast wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 36. Light southeast wind.
Sunday
Mostly sunny, with a high near 63. South wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 47. South wind 5 to 7 mph.
Monday
A slight chance of showers. Mostly sunny, with a high near 69. South wind 7 to 11 mph, with gusts 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:
8:16 pm CDT Mar 23, 2026
Forecast Valid:
9pm CDT Mar 23, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation