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.

Overcast

47°F

8°C

Humidity 50%
Wind Speed NE 9 mph
Barometer 30.35 in (1028.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 7 Apr 4:56 am CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 53. East northeast wind 8 to 10 mph.

    High: 53 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 37. East wind around 6 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71. South wind 6 to 10 mph.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. South wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. South southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53. South wind around 6 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 7 to 10 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Southeast wind around 6 mph.

    High: 75 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 53. East northeast wind 8 to 10 mph.
Tonight
Partly cloudy, with a low around 37. East wind around 6 mph.
Wednesday
Mostly sunny, with a high near 71. South wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 52. South wind 7 to 9 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 75. South southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 53. South wind around 6 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southwest wind 7 to 10 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Light and variable wind.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Southeast wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 58. East southeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 81. South wind 7 to 15 mph, with gusts as high as 23 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind 10 to 13 mph, with gusts as high as 23 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WSW Johnsonville IL
 38.48°N 88.68°W
Last Update:
4:06 am CDT Apr 7, 2026
Forecast Valid:
5am CDT Apr 7, 2026-6pm CDT Apr 13, 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