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.

Fair

100°F

38°C

Humidity 34%
Wind Speed S 10 mph
Barometer 30.00 in (1015.6 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 1 Sep 4:56 pm CDT
Extended Forecast for

3 Miles SW Whittington IL

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

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 100 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 77. South wind 3 to 5 mph.

    Low: 77 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. Heat index values as high as 106. South southwest wind 3 to 8 mph.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 78. South wind around 6 mph becoming calm in the evening.

    Low: 78 °F

    Clear

  • Thursday

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

    High: 100 °F

    Hot

  • Thursday Night

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

    Low: 78 °F

    Clear

  • Friday

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

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Calm wind.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. South southwest wind around 5 mph.
Tonight
Clear, with a low around 77. South wind 3 to 5 mph.
Wednesday
Sunny and hot, with a high near 101. Heat index values as high as 106. South southwest wind 3 to 8 mph.
Wednesday Night
Clear, with a low around 78. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 100. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Clear, with a low around 78. South wind around 5 mph becoming calm in the evening.
Friday
Sunny and hot, with a high near 100. Light west southwest wind.
Friday Night
Mostly clear, with a low around 77. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Sunny and hot, with a high near 99. Light west northwest wind.
Saturday Night
Partly cloudy, with a low around 74. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Sunny, with a high near 95. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 71. East northeast wind around 5 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 93. Calm wind becoming east southeast around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 69. East wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 93. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Whittington IL
 38.07°N 88.93°W
Last Update:
1:26 pm CDT Sep 1, 2026
Forecast Valid:
5pm CDT Sep 1, 2026-6pm CDT Sep 8, 2026
 
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Additional Resources

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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