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

32°F

0°C

Humidity 92%
Wind Speed Calm
Barometer 30.06 in (1018.4 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 28 Feb 5:56 am CST
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Today

    Today: A slight chance of showers before 3pm, then a slight chance of showers after 5pm. Increasing clouds, with a high near 63. North northeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 20%.

    High: 63 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Light and variable wind becoming north 5 to 10 mph in the evening. Winds could gust as high as 20 mph.

    Low: 31 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 45. North northeast wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Snow showers likely, mainly after midnight. Cloudy, with a low around 30. East northeast wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    Low: 30 °F

    Snow Showers
    Likely

  • Monday

    Monday: A chance of rain and snow showers before 9am, then a chance of rain showers between 9am and noon. Cloudy, with a high near 44. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Cloudy

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Cloudy, with a low around 37. East southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 37 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 61. South southwest wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 61 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers, with thunderstorms also possible after midnight. Cloudy, with a low around 50. South southwest wind around 8 mph becoming east after midnight.

    Low: 50 °F

    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 64. South wind 7 to 10 mph.

    High: 64 °F

    Showers
    Likely

Detailed Forecast

Today
A slight chance of showers before 3pm, then a slight chance of showers after 5pm. Increasing clouds, with a high near 63. North northeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 20%.
Tonight
A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Light and variable wind becoming north 5 to 10 mph in the evening. Winds could gust as high as 20 mph.
Sunday
Mostly cloudy, with a high near 45. North northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Snow showers likely, mainly after midnight. Cloudy, with a low around 30. East northeast wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Monday
A chance of rain and snow showers before 9am, then a chance of rain showers between 9am and noon. Cloudy, with a high near 44. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 37. East southeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 61. South southwest wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Tuesday Night
Showers, with thunderstorms also possible after midnight. Cloudy, with a low around 50. South southwest wind around 8 mph becoming east after midnight.
Wednesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 64. South wind 7 to 10 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. South wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday
A chance of showers. Partly sunny, with a high near 68. Southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56. South wind around 7 mph.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 72. South southwest wind 7 to 11 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:
5:01 am CST Feb 28, 2026
Forecast Valid:
6am CST Feb 28, 2026-6pm CST Mar 6, 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