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.

60°F

16°C

Humidity 75%
Wind Speed Calm
Barometer 29.90 in (1012.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 20 Mar 10:56 pm CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. Light and variable wind becoming east southeast around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61. South southwest wind 3 to 8 mph.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 39. North wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 39 °F

    Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 56. North wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. East wind 3 to 5 mph.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59. East southeast wind around 6 mph becoming south in the afternoon.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 42. Light and variable wind becoming south around 5 mph after midnight.

    Low: 42 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 51. Calm wind.
Saturday
Sunny, with a high near 79. Light and variable wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 61. South southwest wind 3 to 8 mph.
Sunday
Mostly sunny, with a high near 83. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Sunday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 39. North wind 10 to 14 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 56. North wind 8 to 10 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 37. East wind 3 to 5 mph.
Tuesday
Partly sunny, with a high near 59. East southeast wind around 6 mph becoming south in the afternoon.
Tuesday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 42. Light and variable wind becoming south around 5 mph after midnight.
Wednesday
A slight chance of showers before 1pm. Mostly cloudy, with a high near 64. East northeast wind 6 to 8 mph becoming southeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 49. South wind 5 to 8 mph.
Thursday
A slight chance of showers. Sunny, with a high near 77. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 42. West southwest wind around 11 mph becoming north after midnight. Winds could gust as high as 22 mph.
Friday
A chance of showers. Partly sunny, with a high near 52. North wind 10 to 13 mph, with gusts as high as 21 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:
11:31 pm CDT Mar 20, 2026
Forecast Valid:
11pm CDT Mar 20, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

Radar & Satellite Image

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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