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.

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

  • Today

    Today: A 20 percent chance of snow after 5pm. Increasing clouds, with a high near 29. South wind 3 to 8 mph.

    High: 29 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Tonight

    Tonight: A 50 percent chance of snow before 11pm. Mostly cloudy, with a low around 19. South southwest wind 3 to 7 mph.

    Low: 19 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 36. West southwest wind 3 to 6 mph.

    High: 36 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow showers. Mostly cloudy, with a high near 35. Calm wind becoming north northeast around 6 mph in the morning.

    High: 35 °F

    Slight Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. North wind 3 to 5 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 29. North wind 3 to 6 mph.

    High: 29 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. Calm wind.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 34. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 34 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of snow after 5pm. Increasing clouds, with a high near 29. South wind 3 to 8 mph.
Tonight
A 50 percent chance of snow before 11pm. Mostly cloudy, with a low around 19. South southwest wind 3 to 7 mph.
Monday
Partly sunny, with a high near 36. West southwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 24. Calm wind.
Tuesday
A 20 percent chance of snow showers. Mostly cloudy, with a high near 35. Calm wind becoming north northeast around 6 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 17. North wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 29. North wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 10. Calm wind.
Thursday
Partly sunny, with a high near 34. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 26. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 42. West southwest wind 7 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 19. North northwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 29. North wind around 6 mph becoming light and variable 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:
8:31 am CST Feb 1, 2026
Forecast Valid:
10am CST Feb 1, 2026-6pm CST Feb 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