Mount Vernon, MD has a humid subtropical climate with hot and humid summers, cool winters, and year-round rain. Summers tend to be long and warm with humidity levels peaking in August, while winters are relatively short and mild. The annual average temperature is around 57°F (14°C). Rainfall is abundant throughout the year with an annual average of 48 inches (122 cm), most of which falls during the summer months. Snowfall is rare but not unheard of, especially in the winter months between December and February.
Mount Vernon, Maryland gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Mount Vernon averages 8 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 212 sunny days per year in Mount Vernon. The US average is 205 sunny days.
Mount Vernon gets some kind of precipitation, on average, 106 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 88 degrees
Winter Low: the January low is 27
Rain: averages 45 inches of rain a year
Snow: averages 8 inches of snow a year