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

74°F

23°C

Humidity 82%
Wind Speed SW 3 mph
Barometer 29.95 in (1013.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 6 Jun 11:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 89. Calm wind becoming south southeast 5 to 9 mph in the afternoon.

    High: 89 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. South southeast wind 3 to 8 mph. Chance of precipitation is 60%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 85. South wind 6 to 9 mph. Chance of precipitation is 90%.

    High: 85 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 72. South wind 3 to 8 mph. Chance of precipitation is 80%.

    Low: 72 °F

    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Southwest wind 6 to 8 mph.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74. South wind around 5 mph.

    Low: 74 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 93. South southwest wind 6 to 10 mph.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South wind 7 to 9 mph.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 72. Calm wind.
Sunday
A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 89. Calm wind becoming south southeast 5 to 9 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. South southeast wind 3 to 8 mph. Chance of precipitation is 60%.
Monday
Showers and possibly a thunderstorm. High near 85. South wind 6 to 9 mph. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm. Low around 72. South wind 3 to 8 mph. Chance of precipitation is 80%.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Southwest wind 6 to 8 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74. South wind around 5 mph.
Wednesday
Sunny, with a high near 93. South southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 75. South wind 7 to 9 mph.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. South southwest wind 7 to 13 mph, with gusts as high as 18 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 5 to 10 mph becoming light southwest after midnight.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. South southwest wind 3 to 7 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 5 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming west northwest around 6 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
9:11 pm CDT Jun 6, 2026
Forecast Valid:
12am CDT Jun 7, 2026-6pm CDT Jun 13, 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