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

58°F

14°C

Humidity 44%
Wind Speed S 3 mph
Barometer 30.09 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 29 Mar 11:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Partly cloudy, with a low around 57. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 22 mph, with gusts as high as 33 mph.

    High: 79 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South southwest wind 14 to 16 mph, with gusts as high as 28 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 32 mph.

    High: 82 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 61. South southwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 61 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 73. Southwest wind 8 to 10 mph becoming south southeast in the afternoon. Chance of precipitation is 80%.

    High: 73 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 58. East wind 9 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.

    Low: 58 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 71. South southwest wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 71 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely. Mostly cloudy, with a low around 52. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 22 mph, with gusts as high as 33 mph.
Monday Night
Mostly clear, with a low around 64. South southwest wind 14 to 16 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 32 mph.
Tuesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 61. South southwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 73. Southwest wind 8 to 10 mph becoming south southeast in the afternoon. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 58. East wind 9 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 71. South southwest wind 13 to 16 mph, with gusts as high as 24 mph.
Thursday Night
Showers likely. Mostly cloudy, with a low around 52. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Friday
A chance of showers. Partly sunny, with a high near 72. South wind 8 to 11 mph.
Friday Night
A chance of showers. Mostly cloudy, with a low around 58. South southeast wind 7 to 9 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. South wind 10 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. South southwest wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 23 mph.
Sunday
A chance of showers. Mostly cloudy, with a high near 62. West northwest wind around 15 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
11:31 pm CDT Mar 29, 2026
Forecast Valid:
12am CDT Mar 30, 2026-6pm CDT Apr 5, 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