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

64°F

18°C

Humidity 29%
Wind Speed W 8 mph
Barometer 30.18 in (1022.5 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 19 Apr 5:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Partly cloudy, with a low around 42. West wind 5 to 8 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 65. Calm wind becoming east around 5 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Calm wind becoming south southeast around 6 mph in the evening.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Southwest wind 6 to 9 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 6 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. South wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 63 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. West wind 5 to 8 mph becoming calm in the evening.
Monday
Sunny, with a high near 65. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 49. Calm wind becoming south southeast around 6 mph in the evening.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78. Southwest wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 6 mph.
Thursday
Sunny, with a high near 80. South wind 7 to 17 mph, with gusts as high as 25 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. South wind around 14 mph, with gusts as high as 23 mph.
Friday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 76. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. West southwest wind 6 to 8 mph becoming north northwest after midnight.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 72. North wind 7 to 10 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 52. North northeast wind around 6 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 71. East northeast wind 6 to 9 mph becoming northwest in the afternoon.
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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:
3:07 pm CDT Apr 19, 2026
Forecast Valid:
6pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
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Additional Resources

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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