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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 30.04 in (1017.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 2 Sep 4:56 am CDT
Extended Forecast for

4 Miles WSW Whittington IL

Extreme Heat Warning September 2, 05:06am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 2, 05:06am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 78. South wind around 5 mph becoming calm in the evening.

    Low: 78 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 79. Light south southwest wind.

    Low: 79 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. Calm wind.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. Calm wind.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 97. Light and variable wind.

    High: 97 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 106. South southwest wind 3 to 7 mph.
Tonight
Clear, with a low around 78. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 98. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 79. Light south southwest wind.
Friday
Sunny and hot, with a high near 99. Calm wind.
Friday Night
Mostly clear, with a low around 79. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 97. Light and variable wind.
Saturday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 75. Calm wind.
Sunday
Sunny, with a high near 94. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 72. East northeast wind 3 to 6 mph.
Labor Day
Sunny, with a high near 93. Calm wind becoming east northeast around 6 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 72. North northeast wind around 6 mph becoming east southeast after midnight.
Tuesday
Mostly sunny, with a high near 94. Light and variable wind becoming south 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Whittington IL
 38.09°N 88.93°W
Last Update:
1:25 am CDT Sep 2, 2026
Forecast Valid:
5am CDT Sep 2, 2026-6pm CDT Sep 8, 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