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.

Overcast

79°F

26°C

Humidity 69%
Wind Speed NA
Barometer 29.82 in (1009.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 2 Aug 2:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Partly sunny, with a high near 79. North wind 5 to 8 mph, with gusts as high as 21 mph.

    High: 79 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. North wind 5 to 9 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 7am. Otherwise, sunny, with a high near 85. Light north northeast wind.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 63. Calm wind.

    Low: 63 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Calm wind.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 88. Light south southwest wind.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of drizzle. Partly sunny, with a high near 79. North wind 5 to 8 mph, with gusts as high as 21 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. North wind 5 to 9 mph becoming calm in the evening.
Monday
Patchy fog before 7am. Otherwise, sunny, with a high near 85. Light north northeast wind.
Monday Night
Clear, with a low around 63. Calm wind.
Tuesday
Sunny, with a high near 87. Calm wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 88. Calm wind.
Wednesday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 68. Calm wind.
Thursday
A chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 88. Light south southwest wind.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Light south southwest wind.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Light southwest wind.
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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:
2:26 pm CDT Aug 2, 2026
Forecast Valid:
3pm CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
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Additional Resources

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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