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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.11 in (1019.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 16 Aug 4:56 am CDT
Extended Forecast for

2 Miles WNW Opdyke IL

Heat Advisory August 16, 12:00pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 96 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

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

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 99. Light south southeast wind.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Light southeast wind.

    Low: 75 °F

    Mostly Clear

  • Tuesday

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

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. North wind 5 to 9 mph.

    High: 88 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind.
Sunday Night
Mostly clear, with a low around 76. Calm wind.
Monday
Sunny and hot, with a high near 99. Light south southeast wind.
Monday Night
Mostly clear, with a low around 75. Light southeast wind.
Tuesday
Sunny and hot, with a high near 98. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. North wind 5 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 67. North northeast wind 5 to 7 mph.
Thursday
Mostly sunny, with a high near 86. Northeast wind 5 to 9 mph.
Thursday Night
Mostly clear, with a low around 66. Northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Opdyke IL
 38.28°N 88.77°W
Last Update:
5:30 am CDT Aug 16, 2025
Forecast Valid:
5am CDT Aug 16, 2025-6pm CDT Aug 22, 2025
 
Forecast Discussion
 
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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