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.

Fair

61°F

16°C

Humidity 81%
Wind Speed NE 5 mph
Barometer 29.99 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 22 May 2:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 60. East northeast wind around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 69. East northeast wind around 8 mph. Chance of precipitation is 70%.

    High: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly before 4am. Mostly cloudy, with a low around 59. Northeast wind around 6 mph becoming calm in the evening.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: A 10 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 80. Light west wind.

    High: 80 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 65. Light east wind.

    Low: 65 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 60. East northeast wind around 5 mph.
Friday
A chance of showers before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 69. East northeast wind around 8 mph. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers, mainly before 4am. Mostly cloudy, with a low around 59. Northeast wind around 6 mph becoming calm in the evening.
Saturday
A 10 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 80. Light west wind.
Saturday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. Calm wind.
Sunday
Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 60%.
Sunday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Memorial Day
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 65. Light east wind.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Southeast wind 3 to 8 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind around 6 mph becoming calm in the evening.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. South wind 5 to 7 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Southeast wind around 5 mph becoming calm in the evening.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming southeast 5 to 7 mph in the morning.
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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:
1:26 am CDT May 22, 2026
Forecast Valid:
3am CDT May 22, 2026-6pm CDT May 28, 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