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

85°F

29°C

Humidity 65%
Wind Speed E 10 mph
Barometer 30.10 in (1019.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 14 Aug 10:56 am CDT
Extended Forecast for

Belle Rive IL

Extreme Heat Warning August 14, 11:31am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 11:31am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Today

    High: 95 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 76. Light southeast wind.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind 3 to 5 mph.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Calm wind becoming southwest around 6 mph after midnight.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 97. West wind 5 to 7 mph.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Light north wind.

    Low: 73 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 88. North wind 3 to 8 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. North wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 95. Heat index values as high as 106. Calm wind becoming south 5 to 8 mph.
Tonight
Mostly clear, with a low around 76. Light southeast wind.
Saturday
Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind 3 to 5 mph.
Saturday Night
Mostly clear, with a low around 76. Calm wind becoming southwest around 6 mph after midnight.
Sunday
Mostly sunny and hot, with a high near 97. West wind 5 to 7 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Light north wind.
Monday
Mostly sunny, with a high near 88. North wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 65. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 88. Calm wind.
Tuesday Night
Mostly clear, with a low around 68. Calm wind.
Wednesday
Mostly sunny, with a high near 94. Calm wind becoming southwest 5 to 9 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South southwest wind around 6 mph becoming north northeast after midnight.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. North wind 5 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Belle Rive IL
 38.24°N 88.75°W
Last Update:
10:56 am CDT Aug 14, 2026
Forecast Valid:
11am CDT Aug 14, 2026-6pm CDT Aug 20, 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