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.

A Few Clouds

79°F

26°C

Humidity 65%
Wind Speed SW 15 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 17 Apr 11:56 am CDT
Extended Forecast for

Mount Vernon IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. South wind around 14 mph, with gusts as high as 23 mph.

    High: 84 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 51. South wind around 13 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers and thunderstorms before 11am, then a slight chance of showers between 11am and 4pm. Temperature falling to around 53 by 9am. West southwest wind 11 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    High: 64 °F⇓

    Showers then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. North northwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Light west wind becoming west northwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. Light and variable wind becoming south southeast 5 to 7 mph in the morning.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. South wind 5 to 7 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. South wind around 14 mph, with gusts as high as 23 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 51. South wind around 13 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Saturday
Showers and thunderstorms before 11am, then a slight chance of showers between 11am and 4pm. Temperature falling to around 53 by 9am. West southwest wind 11 to 16 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Saturday Night
Mostly clear, with a low around 38. North northwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 65. Light west wind becoming west northwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 69. Light and variable wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 51. South wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 55. South southwest wind 6 to 9 mph.
Wednesday
Sunny, with a high near 79. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 6 mph.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. South wind 6 to 11 mph, with gusts as high as 18 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:
12:06 pm CDT Apr 17, 2026
Forecast Valid:
12pm CDT Apr 17, 2026-6pm CDT Apr 23, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation