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

60°F

16°C

Humidity 86%
Wind Speed Calm
Barometer 29.96 in (1014.6 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 17 Apr 5:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Light and variable wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 23 mph.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 52. South wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a temperature falling to around 55 by 8am. Northwest wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    High: 65 °F⇓

    Showers
    Likely

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Northwest wind 6 to 11 mph becoming light west after midnight. Winds could gust as high as 21 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

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Light and variable wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 52. South wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a temperature falling to around 55 by 8am. Northwest wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday Night
Mostly clear, with a low around 38. Northwest wind 6 to 11 mph becoming light west after midnight. Winds could gust as high as 21 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:
5:56 am CDT Apr 17, 2026
Forecast Valid:
6am CDT Apr 17, 2026-6pm CDT Apr 23, 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