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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 14. North wind around 5 mph becoming calm in the evening.

    Low: 14 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 31. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 31 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 28. West southwest wind around 6 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 46. West southwest wind 6 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 46 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. North northwest wind 6 to 8 mph.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 33. North northeast wind around 6 mph becoming east southeast in the afternoon.

    High: 33 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 21. Southeast wind 3 to 6 mph.

    Low: 21 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 48. South wind 3 to 7 mph.

    High: 48 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 14. North wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 31. Calm wind becoming south southwest 5 to 8 mph in the morning.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 28. West southwest wind around 6 mph.
Friday
Mostly sunny, with a high near 46. West southwest wind 6 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Mostly cloudy, with a low around 22. North northwest wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 33. North northeast wind around 6 mph becoming east southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 21. Southeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 48. South wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 29. Calm wind.
Monday
Sunny, with a high near 52. Calm wind becoming south southwest around 5 mph.
Monday Night
Mostly clear, with a low around 37. South southwest wind 3 to 5 mph.
Tuesday
A slight chance of showers. Partly sunny, with a high near 58. South southwest wind 5 to 7 mph.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 40. Southwest wind around 6 mph becoming northwest after midnight.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 55. Northwest wind 6 to 8 mph becoming south southeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WSW Johnsonville IL
 38.48°N 88.68°W
Last Update:
6:26 pm CST Feb 4, 2026
Forecast Valid:
9pm CST Feb 4, 2026-6pm CST Feb 11, 2026
 
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Additional Resources

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Chance of Precipitation