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.

Thunderstorm Light Rain

69°F

21°C

Humidity 81%
Wind Speed N 9 G 29 mph
Barometer 29.96 in
Dewpoint 63°F (17°C)
Visibility 7.00 mi
Last update 16 May 4:56 pm CDT
Extended Forecast for

Mount Vernon IL

Severe T-storm Watch until May 16, 10:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until May 16, 10:00pm

    NOW until 10:00pm Sat

    Severe T-storm Watch

  • This Afternoon

    High: 75 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 67. Southeast wind 5 to 7 mph.

    Low: 67 °F

    Chance
    T-storms then
    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 24 mph.

    High: 88 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind 10 to 13 mph, with gusts as high as 22 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 14 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. Partly 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. Mostly cloudy, with a low around 64. South southwest wind 5 to 9 mph becoming northwest after midnight.

    Low: 64 °F

    Showers

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 75. South wind around 7 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 67. Southeast wind 5 to 7 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 88. South wind 8 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 69. South wind 10 to 13 mph, with gusts as high as 22 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 14 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly 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. Mostly cloudy, with a low around 64. South southwest wind 5 to 9 mph becoming northwest after midnight.
Wednesday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 74. 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. Partly sunny, with a high near 71. 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 slight chance of showers. Partly sunny, with a high near 81. East northeast wind 3 to 6 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon IL
 38.33°N 88.91°W
Last Update:
4:46 pm CDT May 16, 2026
Forecast Valid:
5pm CDT May 16, 2026-6pm CDT May 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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