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.

Thunderstorm Heavy Rain Fog/Mist

61°F

16°C

Humidity 90%
Wind Speed SW 18 G 26 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 58°F (14°C)
Visibility 4.00 mi
Last update 7 Mar 3:56 am CST
Extended Forecast for

9 Miles WSW Johnsonville IL

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 3pm. Temperature rising to near 69 by noon, then falling to around 59 during the remainder of the day. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    High: 69 °F⇓

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63. Calm wind becoming southwest around 6 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 45. South southwest wind 3 to 6 mph.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 58. South southwest wind 14 to 17 mph, with gusts as high as 31 mph.

    Low: 58 °F

    Showers

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Saturday
Showers and thunderstorms, mainly before 3pm. Temperature rising to near 69 by noon, then falling to around 59 during the remainder of the day. Southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, with a low around 39. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 18 mph.
Sunday
Sunny, with a high near 63. Calm wind becoming southwest around 6 mph.
Sunday Night
Clear, with a low around 45. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 73. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 58. South southwest wind 14 to 17 mph, with gusts as high as 31 mph.
Wednesday
Showers and possibly a thunderstorm before noon, then showers likely. Cloudy, with a high near 66. Breezy, with a south southwest wind 14 to 20 mph becoming north northwest in the afternoon. Winds could gust as high as 31 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 34. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 52. Northwest wind 6 to 9 mph.
Thursday Night
Mostly cloudy, with a low around 38. West southwest wind 5 to 13 mph becoming south in the evening. Winds could gust as high as 24 mph.
Friday
Mostly cloudy, with a high near 62. South southwest wind 11 to 17 mph, with gusts as high as 26 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WSW Johnsonville IL
 38.48°N 88.68°W
Last Update:
12:26 am CST Mar 7, 2026
Forecast Valid:
4am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
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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