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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Rain. Low around 43. East northeast wind around 8 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain

  • Sunday

    Sunday: A 40 percent chance of rain, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 56. North northeast wind 6 to 13 mph, with gusts as high as 24 mph.

    High: 56 °F

    Chance Rain
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 61. Calm wind becoming south 5 to 9 mph in the morning.

    High: 61 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind around 6 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63. South wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 33 mph.

    Low: 58 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71. West southwest wind 9 to 18 mph, with gusts as high as 29 mph.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. West southwest wind 5 to 7 mph becoming south southeast after midnight.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain. Low around 43. East northeast wind around 8 mph. Chance of precipitation is 90%.
Sunday
A 40 percent chance of rain, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 56. North northeast wind 6 to 13 mph, with gusts as high as 24 mph.
Sunday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 34. Light and variable wind.
Washington's Birthday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 61. Calm wind becoming south 5 to 9 mph in the morning.
Monday Night
Mostly cloudy, with a low around 42. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 63. South wind 6 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 58. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 33 mph.
Wednesday
Mostly sunny, with a high near 71. West southwest wind 9 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 46. West southwest wind 5 to 7 mph becoming south southeast after midnight.
Thursday
A chance of showers, mainly after noon. Mostly sunny, with a high near 71. South southwest wind 5 to 13 mph, with gusts as high as 21 mph.
Thursday Night
A chance of showers. Partly cloudy, with a low around 43. South southwest wind 9 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 55. West wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 31. West northwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 50. West northwest wind 6 to 9 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:
3:21 am CST Feb 15, 2026
Forecast Valid:
3am CST Feb 15, 2026-6pm CST Feb 21, 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