Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33° N Lon: 88.85° W Elev: 466 ft.

Fair

44°F

7°C

Humidity 79%
Wind Speed Calm
Barometer 30.32 in (1027.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 5 Apr 8:56 pm CDT
Detailed forecast for

Jefferson County

Tonight
Clear. Lows in the upper 30s. Northwest winds around 5 mph, becoming west after midnight.
Monday
Sunny. Highs in the lower 60s. Northwest winds 5 to 10 mph.
Monday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows around 40. North winds 5 to 10 mph.
Tuesday
Partly sunny. Highs in the mid 50s. Northeast winds 5 to 10 mph.
Tuesday Night
Partly cloudy. Lows in the upper 30s. East winds 5 to 10 mph.
Wednesday Through Thursday
Partly cloudy. Highs in the lower 70s. Lows in the lower 50s.
Thursday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s.
Friday Through Saturday
Mostly cloudy with a chance of showers. Highs in the upper 70s. Lows in the upper 50s. Chance of rain 30 percent.
Saturday Night
Mostly cloudy. Lows in the lower 60s.
Sunday
Partly sunny with a chance of showers. Highs in the lower 80s. Chance of rain 40 percent.



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754 PM CDT Sun Apr 5 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database