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

45°F

7°C

Humidity 100%
Wind Speed Calm
Barometer 29.99 in (1016.1 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 7 Oct 12:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Clear, with a low around 46. Calm wind.

    Low: 46 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56. Light and variable wind.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 52. Light northeast wind.

    Low: 52 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 84. Calm wind becoming east southeast 5 to 7 mph in the morning.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 56. Southeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58. Southeast wind 3 to 6 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 46. Calm wind.
Wednesday
Sunny, with a high near 89. Calm wind becoming west southwest 5 to 9 mph in the morning.
Wednesday Night
Clear, with a low around 56. Light and variable wind.
Thursday
Sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 52. Light northeast wind.
Friday
Sunny, with a high near 84. Calm wind becoming east southeast 5 to 7 mph in the morning.
Friday Night
Clear, with a low around 56. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 88. Light south southeast wind becoming south 6 to 11 mph in the morning.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58. Southeast wind 3 to 6 mph.
Sunday
A chance of showers. Partly sunny, with a high near 78. East wind 6 to 11 mph.
Sunday Night
Partly cloudy, with a low around 57. East northeast wind around 5 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 83. Calm wind becoming north northwest 5 to 8 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 58. East southeast wind around 6 mph becoming calm in the evening.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. Southwest wind 5 to 11 mph.
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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:
11:36 pm CDT Oct 6, 2026
Forecast Valid:
1am CDT Oct 7, 2026-6pm CDT Oct 13, 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