St. Marys, WV enjoys a humid continental climate with mild temperatures during the spring and summer months, and cold winters with lots of snowfall. Average high temperatures in the summer range from 81-86 degrees Fahrenheit, while winter highs generally stay between 28-34 degrees Fahrenheit. The area receives about 37 inches of precipitation each year, with most of that occurring in the spring and early summer months. The area also experiences average snowfall of about 38 inches each year, usually occurring from October through December.
St. Marys, West Virginia gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
St. Marys averages 23 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 173 sunny days per year in St. Marys. The US average is 205 sunny days.
St. Marys gets some kind of precipitation, on average, 137 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 85 degrees
Winter Low: the January low is 21
Rain: averages 43 inches of rain a year
Snow: averages 23 inches of snow a year