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Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

62°F

17°C

Humidity 96%
Wind Speed Calm
Barometer 29.93 in (1013.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Jun 4:56 am CDT
Extended Forecast for

3 Miles ESE Opdyke IL

Flood Watch June 21, 01:00pm until June 22, 07:00am
Lake Wind Advisory June 21, 12:00pm until June 21, 07:00pm
Click here for hazard details and duration
Flood Watch
Lake Wind Advisory

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 88. Light and variable wind becoming south southwest 12 to 17 mph in the morning. Winds could gust as high as 24 mph.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 67. Southwest wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    Low: 67 °F

    Heavy Rain
    then Showers

  • Monday

    Monday: Showers and thunderstorms likely before 11am, then a chance of showers between 11am and noon. Mostly cloudy, with a high near 78. North northwest wind 8 to 10 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 5 to 8 mph becoming calm in the evening.

    Low: 60 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 82. Light northeast wind.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84. Calm wind.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 88. Light and variable wind becoming south southwest 12 to 17 mph in the morning. Winds could gust as high as 24 mph.
Tonight
Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 67. Southwest wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Monday
Showers and thunderstorms likely before 11am, then a chance of showers between 11am and noon. Mostly cloudy, with a high near 78. North northwest wind 8 to 10 mph. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 62. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84. Calm wind.
Wednesday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. Calm wind.
Thursday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 64. Light north wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Light and variable wind.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Light and variable wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Light south southeast wind becoming south 5 to 10 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Opdyke IL
 38.26°N 88.72°W
Last Update:
4:11 am CDT Jun 21, 2026
Forecast Valid:
6am CDT Jun 21, 2026-6pm CDT Jun 27, 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