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.

Thunderstorm

85°F

29°C

Humidity 75%
Wind Speed S 7 mph
Barometer 30.10 in (1019.0 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 7 Aug 11:56 am CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 90. South southwest wind 3 to 5 mph.

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms, mainly between 8pm and 10pm. Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 91. Light southwest wind.

    High: 91 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 3 to 6 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. South southwest wind 5 to 10 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. South southwest wind 7 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Southwest wind 6 to 9 mph.

    High: 94 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 90. South southwest wind 3 to 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms, mainly between 8pm and 10pm. Partly cloudy, with a low around 70. Calm wind.
Saturday
Mostly sunny, with a high near 91. Light southwest wind.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Sunny, with a high near 94. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 74. South wind 3 to 6 mph.
Monday
Sunny, with a high near 95. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 76. South southwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 94. Southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. South southwest wind 5 to 10 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 90. West southwest wind 5 to 9 mph.
Wednesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Light and variable wind.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming west northwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
12:06 pm CDT Aug 7, 2026
Forecast Valid:
12pm CDT Aug 7, 2026-6pm CDT Aug 13, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation