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 and Breezy

72°F

22°C

Humidity 82%
Wind Speed SW 21 G 28 mph
Barometer 29.73 in (1006.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 11 Mar 3:56 am CDT
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Cloudy, with a steady temperature around 70. South southwest wind around 17 mph, with gusts as high as 31 mph.

    Low: 70 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms before 4pm, then a chance of showers. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%.

    High: 67 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 31. North northwest wind 8 to 17 mph, with gusts as high as 29 mph.

    Low: 31 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Sunny, with a high near 53. Northwest wind 5 to 9 mph.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 61. Southwest wind 13 to 18 mph, with gusts as high as 29 mph.

    High: 61 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36. West northwest wind around 6 mph becoming light and variable.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62. East northeast wind 6 to 10 mph becoming southeast in the afternoon.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51. Southeast wind 8 to 14 mph, with gusts as high as 23 mph.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Cloudy, with a steady temperature around 70. South southwest wind around 17 mph, with gusts as high as 31 mph.
Wednesday
Showers and thunderstorms before 4pm, then a chance of showers. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%.
Wednesday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 31. North northwest wind 8 to 17 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 53. Northwest wind 5 to 9 mph.
Thursday Night
Partly cloudy, with a low around 41. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.
Friday
Partly sunny, with a high near 61. Southwest wind 13 to 18 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 36. West northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 62. East northeast wind 6 to 10 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 51. Southeast wind 8 to 14 mph, with gusts as high as 23 mph.
Sunday
A chance of showers and thunderstorms, then showers after 1pm. Mostly cloudy, with a high near 67. Breezy, with a south wind 15 to 23 mph, with gusts as high as 32 mph.
Sunday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 26. Blustery, with a west northwest wind 18 to 21 mph, with gusts as high as 32 mph.
Monday
Sunny, with a high near 37. Northwest wind 15 to 18 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 20. Northwest wind 6 to 10 mph.
Tuesday
Partly sunny, with a high near 40. West northwest wind 5 to 8 mph.
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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:
3:26 am CDT Mar 11, 2026
Forecast Valid:
4am CDT Mar 11, 2026-6pm CDT Mar 17, 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