Current conditions at

Mount Vernon Airport (KMVN)

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

Partly Cloudy

65°F

18°C

Humidity 29%
Wind Speed W 9 mph
Barometer 30.19 in (1022.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 19 Apr 4:56 pm CDT
Detailed forecast for

Jefferson County

Tonight
Mostly clear this evening, then becoming partly cloudy. Lows in the lower 40s. Northwest winds 5 to 10 mph, becoming northeast after midnight.
Monday
Sunny. Highs in the mid 60s. East winds around 5 mph.
Monday Night
Mostly clear. Lows in the upper 40s. South winds 5 to 10 mph.
Tuesday
Mostly sunny. Highs in the mid 70s. Southwest winds 10 to 15 mph.
Tuesday Night
Mostly clear. Lows in the mid 50s. Southwest winds 10 to 15 mph.
Wednesday Through Thursday
Mostly clear. Highs in the upper 70s. Lows in the upper 50s.
Thursday Night
Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
Friday
Showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 80 percent.
Friday Night
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the mid 50s. Chance of rain 50 percent.
Saturday
Partly sunny. A chance of showers in the morning. Highs in the lower 70s. Chance of rain 40 percent.
Saturday Night
Partly cloudy. A chance of showers after midnight. Lows in the lower 50s. Chance of rain 30 percent.
Sunday
Mostly sunny. A chance of showers in the afternoon. Highs around 70. Chance of rain 30 percent.



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308 PM CDT Sun Apr 19 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database