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

64°F

18°C

Humidity 78%
Wind Speed S 6 mph
Barometer 30.17 in (1021.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 12 Apr 12:56 am CDT
Extended Forecast for

Mount Vernon IL

  • Overnight

    Overnight: Mostly clear, with a low around 59. South wind around 7 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 82 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 65. South wind 14 to 16 mph, with gusts as high as 26 mph.

    Low: 65 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly between 10am and 1pm. Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 85 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 67 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South southwest wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 59. South wind around 7 mph.
Sunday
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 65. South wind 14 to 16 mph, with gusts as high as 26 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly between 10am and 1pm. Mostly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 68. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South southwest wind 10 to 15 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southwest wind 8 to 10 mph.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 61. South southwest wind 3 to 5 mph.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind around 9 mph, with gusts as high as 18 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. South southwest wind 10 to 14 mph, with gusts as high as 21 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:
1:26 am CDT Apr 12, 2026
Forecast Valid:
1am CDT Apr 12, 2026-6pm CDT Apr 18, 2026
 
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Additional Resources

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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