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.

Overcast

75°F

24°C

Humidity 79%
Wind Speed N 3 mph
Barometer 30.02 in (1016.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 21 Aug 7:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. Light north northeast wind.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 85. Calm wind becoming north northeast around 6 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Light northeast wind.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 88. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. North northwest wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 82. Light north northwest wind increasing to 5 to 10 mph in the morning.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 79. Calm wind becoming northwest 5 to 9 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. North northwest wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 64. Light north northeast wind.
Friday
Mostly sunny, with a high near 85. Calm wind becoming north northeast around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 64. Light northeast wind.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 61. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 82. Light north northwest wind increasing to 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 79. Calm wind becoming northwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 53. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 77. Calm wind becoming north northwest around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 52. Light north wind.
Wednesday
Sunny, with a high near 79. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 54. Calm wind.
Thursday
Mostly sunny, with a high near 83. Calm wind becoming south southeast around 5 mph 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:
7:16 pm CDT Aug 21, 2025
Forecast Valid:
8pm CDT Aug 21, 2025-6pm CDT Aug 28, 2025
 
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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