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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

79°F

26°C

Humidity 90%
Wind Speed S 6 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 30 Jun 11:56 pm CDT
Extended Forecast for

Mount Vernon IL

Extreme Heat Warning July 1, 12:24am until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 12:24am until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Heat index values as high as 106. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.

    Low: 76 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Heat index values as high as 106. Light south southwest wind.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. Light and variable wind.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms

  • Independence Day

    Independence Day: A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind.

    High: 94 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 74. Light south southwest wind.
Wednesday
Sunny, with a high near 95. Heat index values as high as 106. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 96. Heat index values as high as 106. Light south southwest wind.
Thursday Night
Mostly clear, with a low around 76. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. Light and variable wind.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74. Calm wind.
Independence Day
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Sunday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. Calm wind.
Sunday Night
Partly cloudy, with a low around 73. Calm wind.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.33°N 88.91°W
Last Update:
10:51 pm CDT Jun 30, 2026
Forecast Valid:
12am CDT Jul 1, 2026-6pm CDT Jul 7, 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