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

34°F

1°C

Humidity 67%
Wind Speed NE 9 mph
Barometer 30.20 in (1023.2 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 1 Mar 1:56 am CST
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Overnight

    Overnight: Mostly clear, with a low around 31. North northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 48. Northeast wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 48 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain showers, snow showers, and sleet likely before 3am, then rain likely, possibly mixed with snow showers between 3am and 4am, then rain showers after 4am. Low around 34. East wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. Little or no snow and sleet accumulation expected.

    Low: 34 °F

    Chance
    Showers then
    Wintry Mix

  • Monday

    Monday: Showers likely, mainly before noon. Cloudy, with a high near 46. East wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    High: 46 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Cloudy, with a low around 41. Light and variable wind becoming south southeast 5 to 7 mph after midnight. Chance of precipitation is 70%.

    Low: 41 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, mainly before noon. Cloudy, with a high near 66. South southwest wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 56. South wind around 6 mph. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 69. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 69 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. South southwest wind around 7 mph.

    Low: 54 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 31. North northeast wind around 10 mph, with gusts as high as 18 mph.
Sunday
Partly sunny, with a high near 48. Northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Rain showers, snow showers, and sleet likely before 3am, then rain likely, possibly mixed with snow showers between 3am and 4am, then rain showers after 4am. Low around 34. East wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. Little or no snow and sleet accumulation expected.
Monday
Showers likely, mainly before noon. Cloudy, with a high near 46. East wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 41. Light and variable wind becoming south southeast 5 to 7 mph after midnight. Chance of precipitation is 70%.
Tuesday
Showers likely, mainly before noon. Cloudy, with a high near 66. South southwest wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Tuesday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 56. South wind around 6 mph. Chance of precipitation is 60%.
Wednesday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 69. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. South southwest wind around 7 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 68. South southwest wind 7 to 10 mph.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 58. South wind around 7 mph.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 55. South wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely. Cloudy, with a high near 66. South southwest wind 7 to 10 mph, with gusts as high as 20 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:
1:52 am CST Mar 1, 2026
Forecast Valid:
2am CST Mar 1, 2026-6pm CST Mar 7, 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