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.

Mostly Cloudy

78°F

26°C

Humidity 62%
Wind Speed SW 17 mph
Barometer 29.92 in (1013.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 Apr 1:56 pm CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, with a high near 82. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 82 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 63. South southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 80. West southwest wind 8 to 10 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 7pm. Mostly clear, with a low around 58. West southwest wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 21 mph.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 69. Southwest wind 11 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 40. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 64. West northwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 64 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, with a high near 82. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tonight
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 63. South southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 80. West southwest wind 8 to 10 mph. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers before 7pm. Mostly clear, with a low around 58. West southwest wind around 5 mph becoming calm in the evening.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 69. Southwest wind 11 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Saturday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 40. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 64. West northwest wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 41. Northwest wind around 6 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 70. South southeast wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 50. South wind around 7 mph.
Tuesday
Sunny, with a high near 76. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.31°N 88.91°W
Last Update:
1:21 pm CDT Apr 15, 2026
Forecast Valid:
2pm CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
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