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.

Overcast

45°F

7°C

Humidity 80%
Wind Speed Vrbl 5 mph
Barometer 30.07 in (1018.9 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 7 Mar 10:56 pm CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. West northwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 21 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 64. Calm wind becoming west southwest 5 to 7 mph in the morning.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. South southwest wind around 6 mph.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after midnight. Mostly clear, with a low around 60. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 60. South southwest wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    Low: 60 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Cloudy, with a high near 70. South southwest wind 15 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.

    High: 70 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before midnight. Partly cloudy, with a low around 32. Northwest wind around 15 mph, with gusts as high as 23 mph.

    Low: 32 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. West northwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 21 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 64. Calm wind becoming west southwest 5 to 7 mph in the morning.
Sunday Night
Clear, with a low around 44. South southwest wind around 6 mph.
Monday
Sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Monday Night
A 20 percent chance of showers after midnight. Mostly clear, with a low around 60. South southwest wind 8 to 10 mph, with gusts as high as 21 mph.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 60. South southwest wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 70. South southwest wind 15 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.
Wednesday Night
A chance of showers before midnight. Partly cloudy, with a low around 32. Northwest wind around 15 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 52. West northwest wind 5 to 14 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 40. Light west southwest wind becoming south 8 to 13 mph in the evening. Winds could gust as high as 24 mph.
Friday
Partly sunny, with a high near 64. Southwest wind 11 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 39. West southwest wind 7 to 9 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Saturday
Mostly cloudy, with a high near 57. North northeast wind 7 to 11 mph becoming east southeast in the afternoon. Winds could gust as high as 18 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:
8:31 pm CST Mar 7, 2026
Forecast Valid:
10pm CST Mar 7, 2026-6pm CDT Mar 14, 2026
 
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Additional Resources

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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