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.

66°F

19°C

Humidity 39%
Wind Speed Vrbl 3 mph
Barometer 30.13 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 14 May 11:56 am CDT
Extended Forecast for

3 Miles NW Mount Vernon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Calm wind.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 53 °F

    Increasing
    Clouds

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 81. East wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of thunderstorms before 7pm, then a chance of showers after 1am. Partly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 84 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. South wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 66 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 7 to 15 mph, with gusts as high as 21 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 88 °F

    Sunny then
    Chance
    T-storms and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Calm wind.
Tonight
Increasing clouds, with a low around 53. Calm wind becoming south southeast around 6 mph after midnight.
Friday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 81. East wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.
Friday Night
A slight chance of thunderstorms before 7pm, then a chance of showers after 1am. Partly cloudy, with a low around 66. South wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 10 to 13 mph, with gusts as high as 20 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. South wind 5 to 9 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 89. South wind 7 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 69. South wind 8 to 13 mph, with gusts as high as 22 mph.
Monday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 83. Southwest wind 11 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Southwest wind 5 to 10 mph.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 81. South southwest wind 5 to 8 mph becoming north northwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Mount Vernon IL
 38.36°N 88.97°W
Last Update:
11:36 am CDT May 14, 2026
Forecast Valid:
12pm CDT May 14, 2026-6pm CDT May 20, 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