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.

Fog/Mist

53°F

12°C

Humidity 96%
Wind Speed Calm
Barometer 30.02 in (1017.0 mb)
Dewpoint 52°F (11°C)
Visibility 1.25 mi
Last update 6 Mar 2:56 am CST
Extended Forecast for

Mount Vernon IL

Dense Fog Advisory until March 6, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 6, 09:00am

    NOW until 9:00am Fri

    Dense Fog Advisory

  • Overnight

    Low: 59 °F

    Slight Chance
    T-storms and
    Areas Dense
    Fog

  • Friday

    Friday: A slight chance of showers and thunderstorms between 2pm and 5pm. Areas of dense fog before 9am. Otherwise, mostly sunny, with a high near 79. South wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 20%.

    High: 79 °F

    Areas Dense
    Fog then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 62. South wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    Low: 62 °F

    Partly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 72. Southwest wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 72 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63. Calm wind becoming southwest around 6 mph in the morning.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. South southwest wind 3 to 6 mph.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 74. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 74 °F

    Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Areas of dense fog. Otherwise, mostly cloudy, with a low around 59. Light south southeast wind.
Friday
A slight chance of showers and thunderstorms between 2pm and 5pm. Areas of dense fog before 9am. Otherwise, mostly sunny, with a high near 79. South wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 62. South wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 72. Southwest wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Saturday Night
Partly cloudy, with a low around 39. Northwest wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 63. Calm wind becoming southwest around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 47. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 74. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Monday Night
A chance of showers, mainly after midnight. Partly cloudy, with a low around 58. South southwest wind around 9 mph, with gusts as high as 20 mph.
Tuesday
Showers likely, with thunderstorms also possible after noon. Partly sunny, with a high near 76. South southwest wind 9 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 58. South southwest wind 14 to 16 mph, with gusts as high as 29 mph.
Wednesday
Showers likely. Mostly cloudy, with a high near 69. Southwest wind 13 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 38. North wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 56. Northeast wind 7 to 11 mph, with gusts as high as 18 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:
1:36 am CST Mar 6, 2026
Forecast Valid:
3am CST Mar 6, 2026-6pm CDT Mar 12, 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