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

N/A

Humidity NA
Wind Speed Vrbl 3 mph
Barometer 30.02 in
Dewpoint N/A
Visibility 10.00 mi
Last update 6 Dec 9:56 am CST
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Mostly sunny, with a high near 44. Calm wind.

    High: 44 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 11pm. Cloudy, with a low around 33. Light southeast wind.

    Low: 33 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 44. South wind 5 to 10 mph becoming north in the afternoon.

    High: 44 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 22. North wind 6 to 10 mph.

    Low: 22 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35. North wind around 6 mph becoming calm in the afternoon.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 22. Calm wind becoming south southwest 5 to 9 mph after midnight.

    Low: 22 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before noon. Partly sunny, with a high near 47. West southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 47 °F

    Slight Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 44. Calm wind.
Tonight
A 20 percent chance of showers after 11pm. Cloudy, with a low around 33. Light southeast wind.
Sunday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 44. South wind 5 to 10 mph becoming north in the afternoon.
Sunday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 22. North wind 6 to 10 mph.
Monday
Mostly sunny, with a high near 35. North wind around 6 mph becoming calm in the afternoon.
Monday Night
Partly cloudy, with a low around 22. Calm wind becoming south southwest 5 to 9 mph after midnight.
Tuesday
Mostly sunny, with a high near 48. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 38. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers before noon. Partly sunny, with a high near 47. West southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 26. Northwest wind 5 to 8 mph becoming north northeast after midnight.
Thursday
A chance of rain and snow showers. Mostly cloudy, with a high near 38. Northeast wind 6 to 9 mph becoming southwest in the afternoon.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 22. East southeast wind around 7 mph becoming northwest in the evening.
Friday
Partly sunny, with a high near 30. North northwest wind 7 to 10 mph.
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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:
9:51 am CST Dec 6, 2025
Forecast Valid:
10am CST Dec 6, 2025-6pm CST Dec 12, 2025
 
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