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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

71°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 30.04 in (1016.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 2 Sep 12:56 am CDT
Extended Forecast for

3 Miles W Mount Vernon IL

Extreme Heat Warning September 2, 01:14am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 2, 01:14am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 78 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. Heat index values as high as 106. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Light south southwest wind.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 106. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 100 °F

    Hot

  • Thursday Night

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

    Low: 76 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Light and variable wind.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 99. Calm wind.

    High: 99 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a steady temperature around 78. Calm wind.
Wednesday
Sunny and hot, with a high near 101. Heat index values as high as 106. Calm wind becoming southwest 5 to 7 mph in the morning.
Wednesday Night
Mostly clear, with a low around 76. Light south southwest wind.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 106. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Clear, with a low around 76. Calm wind.
Friday
Sunny and hot, with a high near 100. Light and variable wind.
Friday Night
Mostly clear, with a low around 75. Calm wind.
Saturday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 99. Calm wind.
Saturday Night
Partly cloudy, with a low around 73. Calm wind.
Sunday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 69. East northeast wind around 5 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 94. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 95. Calm wind becoming south around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Mount Vernon IL
 38.31°N 88.97°W
Last Update:
12:41 am CDT Sep 2, 2026
Forecast Valid:
1am CDT Sep 2, 2026-6pm CDT Sep 8, 2026
 
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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