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.

Fair

68°F

20°C

Humidity 96%
Wind Speed N 3 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 21 Sep 6:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: A 20 percent chance of showers between 1pm and 2pm. Mostly cloudy, with a high near 82. Calm wind becoming north northeast 5 to 7 mph in the afternoon.

    High: 82 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 61. North northeast wind 5 to 9 mph.

    Low: 61 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. North northeast wind 6 to 11 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56. North northeast wind 5 to 10 mph becoming light.

    Low: 56 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. North northeast wind 5 to 11 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. North northeast wind 5 to 9 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Light north northeast wind increasing to 5 to 9 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. North northeast wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming east northeast 5 to 8 mph in the morning.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers between 1pm and 2pm. Mostly cloudy, with a high near 82. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 61. North northeast wind 5 to 9 mph.
Tuesday
Mostly sunny, with a high near 77. North northeast wind 6 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 56. North northeast wind 5 to 10 mph becoming light.
Wednesday
Mostly sunny, with a high near 77. North northeast wind 5 to 11 mph.
Wednesday Night
Partly cloudy, with a low around 55. North northeast wind 5 to 9 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 78. Light north northeast wind increasing to 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 55. North northeast wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 78. Calm wind becoming east northeast 5 to 8 mph in the morning.
Friday Night
Partly cloudy, with a low around 53. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 77. Calm wind becoming east northeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55. Calm wind.
Sunday
Mostly sunny, with a high near 83. Light northeast wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.33°N 88.91°W
Last Update:
6:07 am CDT Sep 21, 2026
Forecast Valid:
7am CDT Sep 21, 2026-6pm CDT Sep 27, 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