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.

Fair

73°F

23°C

Humidity 33%
Wind Speed S 12 mph
Barometer 30.14 in (1020.8 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 8 Apr 5:56 pm CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Tonight

    Tonight: Mostly clear, with a low around 53. South wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. South wind 6 to 8 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 8 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northwest wind around 5 mph becoming light and variable. Chance of precipitation is 40%.

    Low: 51 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 74. East wind around 6 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58. East southeast wind 3 to 6 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 80. South southwest wind 7 to 16 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 53. South wind 6 to 8 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 76. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 54. South wind 6 to 8 mph.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 8 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northwest wind around 5 mph becoming light and variable. Chance of precipitation is 40%.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 74. East wind around 6 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 58. East southeast wind 3 to 6 mph.
Sunday
Mostly cloudy, with a high near 80. South southwest wind 7 to 16 mph, with gusts as high as 25 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. South wind 10 to 14 mph, with gusts as high as 25 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 79. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. South southwest wind around 11 mph, with gusts as high as 21 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 71. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WSW Johnsonville IL
 38.48°N 88.68°W
Last Update:
3:52 pm CDT Apr 8, 2026
Forecast Valid:
6pm CDT Apr 8, 2026-6pm CDT Apr 15, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation