National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Mostly Cloudy

68°F

20°C

Humidity 93%
Wind Speed S 5 mph
Barometer 29.89 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 16 May 7:56 pm CDT
Extended Forecast for

3 Miles SSE Mount Vernon IL

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 71. Light and variable wind becoming south southeast around 6 mph in the evening.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 88. South wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 88 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 88 °F

    Mostly Sunny
    then Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71. South wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 71 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. South southwest wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 64. South southwest wind 5 to 9 mph becoming west northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 75. North wind around 9 mph.

    High: 75 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 54. North northeast wind 6 to 9 mph.

    Low: 54 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a steady temperature around 71. Light and variable wind becoming south southeast around 6 mph in the evening.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 88. South wind 8 to 16 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 69. South wind 9 to 13 mph, with gusts as high as 21 mph.
Monday
Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71. South wind 11 to 13 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. South southwest wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 64. South southwest wind 5 to 9 mph becoming west northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%.
Wednesday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 75. North wind around 9 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 54. North northeast wind 6 to 9 mph.
Thursday
A slight chance of showers before 1pm. Partly sunny, with a high near 72. Northeast wind around 9 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 55. Northeast wind 5 to 8 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 75. Northeast wind around 7 mph.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 58. Northeast wind around 6 mph becoming calm in the evening.
Saturday
A chance of showers. Partly sunny, with a high near 81. East northeast wind 3 to 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Mount Vernon IL
 38.29°N 88.89°W
Last Update:
7:16 pm CDT May 16, 2026
Forecast Valid:
8pm CDT May 16, 2026-6pm CDT May 23, 2026
 
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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