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.

Mostly Cloudy

84°F

29°C

Humidity 67%
Wind Speed Vrbl 7 mph
Barometer 30.12 in (1019.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 12 Jul 1:56 pm CDT
Extended Forecast for

8 Miles WSW Johnsonville IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 84. North northeast wind around 9 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. North northeast wind 3 to 6 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85. Light north northeast wind becoming northeast 5 to 9 mph in the morning.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 67. North northeast wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind becoming east northeast 5 to 7 mph in the morning.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. Calm wind.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Calm wind.

    High: 90 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 84. North northeast wind around 9 mph.
Tonight
Mostly clear, with a low around 66. North northeast wind 3 to 6 mph.
Monday
Sunny, with a high near 85. Light north northeast wind becoming northeast 5 to 9 mph in the morning.
Monday Night
Clear, with a low around 67. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 88. Calm wind becoming east northeast 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 69. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. Calm wind.
Wednesday Night
Mostly clear, with a low around 70. Calm wind.
Thursday
Sunny, with a high near 90. Calm wind.
Thursday Night
Mostly clear, with a low around 71. Calm wind.
Friday
Sunny, with a high near 90. Calm wind becoming west southwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 72. Light south southwest wind.
Saturday
Sunny, with a high near 90. West southwest wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles WSW Johnsonville IL
 38.48°N 88.68°W
Last Update:
1:26 pm CDT Jul 12, 2026
Forecast Valid:
2pm CDT Jul 12, 2026-6pm CDT Jul 18, 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