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

78°F

26°C

Humidity 85%
Wind Speed Calm
Barometer 30.11 in (1019.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 7 Aug 10:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Isolated showers before 3am. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 20%.

    Low: 72 °F

    Isolated
    Showers

  • Friday

    Friday: Sunny, with a high near 94. Calm wind becoming south 5 to 8 mph in the morning.

    High: 94 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. South southeast wind 3 to 6 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94. South wind 5 to 9 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. South wind around 6 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. South wind 3 to 7 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South southeast wind around 6 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. South southwest wind 3 to 6 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 73. South southeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Isolated showers before 3am. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 20%.
Friday
Sunny, with a high near 94. Calm wind becoming south 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 73. South southeast wind 3 to 6 mph.
Saturday
Sunny, with a high near 94. South wind 5 to 9 mph.
Saturday Night
Mostly clear, with a low around 73. South wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 95. South wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 73. South southeast wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 93. South southwest wind 3 to 6 mph.
Monday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 73. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming south southwest around 6 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 71. Light south wind.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.33°N 88.91°W
Last Update:
11:47 pm CDT Aug 7, 2025
Forecast Valid:
12am CDT Aug 8, 2025-6pm CDT Aug 14, 2025
 
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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