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

32°F

0°C

Humidity 73%
Wind Speed N 3 mph
Barometer 30.11 in (1020.2 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 21 Feb 3:56 am CST
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Today

    Today: A chance of snow showers before 11am, then a chance of sprinkles and flurries between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 40. North northwest wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 40 °F

    Chance
    Sprinkles/Snow

  • Tonight

    Tonight: Mostly clear, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 24 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 32. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.

    High: 32 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17. Northwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 33. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. South southwest wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. South southwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 59. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
A chance of snow showers before 11am, then a chance of sprinkles and flurries between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 40. North northwest wind 3 to 7 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 32. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 17. Northwest wind 11 to 13 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 33. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 47. South southwest wind 5 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 38. South southwest wind around 10 mph, with gusts as high as 22 mph.
Wednesday
Partly sunny, with a high near 59. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 38. Southwest wind around 8 mph becoming north northwest after midnight.
Thursday
A chance of showers. Mostly sunny, with a high near 51. West northwest wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 30. Northwest wind around 5 mph becoming southwest after midnight.
Friday
Sunny, with a high near 57. South southwest wind 5 to 9 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:
3:17 am CST Feb 21, 2026
Forecast Valid:
4am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation