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.

Fog/Mist

68°F

20°C

Humidity 100%
Wind Speed Calm
Barometer 30.08 in (1018.6 mb)
Dewpoint 68°F (20°C)
Visibility 1.25 mi
Last update 10 Aug 5:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Mostly sunny, with a high near 93. Calm wind becoming south 5 to 8 mph in the morning.

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 71. South wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the morning.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 72. Light south southeast wind.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 93 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light west southwest wind.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 93. Calm wind becoming south 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 71. South wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the morning.
Monday Night
Mostly clear, with a low around 72. Light south southeast wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light west southwest wind.
Wednesday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. Calm wind.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.
Thursday Night
Mostly clear, with a low around 72. Light and variable wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 73. Light south wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon.
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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:
5:00 am CDT Aug 10, 2025
Forecast Valid:
6am CDT Aug 10, 2025-6pm CDT Aug 16, 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