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

31°C

87°F

Humidity 51%
Wind Speed Calm
Barometer 1017.8 mb (30.06 in)
Dewpoint 19°C (67°F)
Visibility 16 km
Heat Index32°C (90°F)
Last update 3 Jul 10:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: Sunny, with a high near 33. Calm wind.

    High: 33 °C

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 22. Calm wind.

    Low: 22 °C

    Mostly Clear

  • Independence Day

    Independence Day: Sunny, with a high near 34. Calm wind becoming south southeast 5 to 8 km/h in the afternoon.

    High: 34 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 22. Calm wind.

    Low: 22 °C

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 34. Light southeast wind becoming south southwest 6 to 11 km/h in the morning.

    High: 34 °C

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23. South wind 3 to 8 km/h.

    Low: 23 °C

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 34. Light south southwest wind becoming west southwest 6 to 11 km/h in the morning.

    High: 34 °C

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 22. West wind 5 to 8 km/h becoming calm in the evening.

    Low: 22 °C

    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 33. North wind 3 to 8 km/h.

    High: 33 °C

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 33. Calm wind.
Tonight
Mostly clear, with a low around 22. Calm wind.
Independence Day
Sunny, with a high near 34. Calm wind becoming south southeast 5 to 8 km/h in the afternoon.
Friday Night
Mostly clear, with a low around 22. Calm wind.
Saturday
Sunny, with a high near 34. Light southeast wind becoming south southwest 6 to 11 km/h in the morning.
Saturday Night
Mostly clear, with a low around 23. South wind 3 to 8 km/h.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 34. Light south southwest wind becoming west southwest 6 to 11 km/h in the morning.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 22. West wind 5 to 8 km/h becoming calm in the evening.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 33. North wind 3 to 8 km/h.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 22. Calm wind.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Calm wind becoming southwest 5 to 8 km/h in the afternoon.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 22. Calm wind.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 31. Calm wind becoming west northwest 5 to 10 km/h in the morning.
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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:
11:16 am CDT Jul 3, 2025
Forecast Valid:
11am CDT Jul 3, 2025-6pm CDT Jul 9, 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