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.

Fair

24°C

75°F

Humidity 88%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 22°C (71°F)
Visibility 16 km
Last update 12 Jul 8:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • Tonight

    Tonight: Patchy dense fog after 1am. Otherwise, partly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Partly Cloudy
    then Patchy
    Dense Fog

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 32. Calm wind. Chance of precipitation is 70%.

    High: 32 °C

    Slight Chance
    T-storms and
    Patchy Fog
    then T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.

    Low: 22 °C

    T-storms
    Likely then
    Slight Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 32. Calm wind.

    High: 32 °C

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.

    Low: 22 °C

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 32. Calm wind becoming south southwest 5 to 10 km/h in the morning.

    High: 32 °C

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23. South southwest wind 3 to 8 km/h.

    Low: 23 °C

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 34. Southwest wind 5 to 11 km/h.

    High: 34 °C

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23. Southwest wind 5 to 8 km/h.

    Low: 23 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy dense fog after 1am. Otherwise, partly cloudy, with a low around 22. Calm wind.
Sunday
Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 32. Calm wind. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 32. Calm wind.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 32. Calm wind becoming south southwest 5 to 10 km/h in the morning.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23. South southwest wind 3 to 8 km/h.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 34. Southwest wind 5 to 11 km/h.
Wednesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23. Southwest wind 5 to 8 km/h.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 34. Southwest wind 8 to 11 km/h.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Southwest wind 5 to 10 km/h becoming calm after midnight.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 32. North northwest wind 5 to 10 km/h becoming west in the morning.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Northwest wind 5 to 8 km/h becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 32. Calm wind becoming west northwest 5 to 8 km/h in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
6:32 pm CDT Jul 12, 2025
Forecast Valid:
9pm CDT Jul 12, 2025-6pm CDT Jul 19, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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