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

42°F

6°C

Humidity 85%
Wind Speed SW 3 mph
Barometer 30.26 in (1025.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 19 Apr 7:56 am CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Today

    Today: Sunny, with a high near 65. West wind 5 to 13 mph, with gusts as high as 21 mph.

    High: 65 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 64. Calm wind becoming east around 5 mph.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47. Calm wind becoming south southeast around 6 mph in the evening.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. Southwest wind 7 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76. West southwest wind 6 to 9 mph.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South southwest wind around 6 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. South wind 6 to 15 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 65. West wind 5 to 13 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.
Monday
Sunny, with a high near 64. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 47. Calm wind becoming south southeast around 6 mph in the evening.
Tuesday
Mostly sunny, with a high near 76. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 55. Southwest wind 7 to 9 mph.
Wednesday
Sunny, with a high near 76. West southwest wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 57. South southwest wind around 6 mph.
Thursday
Sunny, with a high near 81. South wind 6 to 15 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind around 10 mph, with gusts as high as 20 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. South southwest wind 10 to 15 mph, with gusts as high as 22 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Southwest wind 7 to 9 mph becoming northwest after midnight.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 69. North northwest wind 9 to 11 mph, with gusts 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:
6:11 am CDT Apr 19, 2026
Forecast Valid:
8am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation