Dennis, MA has a humid continental climate, with warm summers and cold winters. During the summer months the temperatures tend to remain in the low to mid-80s Fahrenheit, while during the winter they stay in the 20s and 30s. The precipitation is fairly evenly spread out throughout the year, although there tends to be more in May and June than other months. Snowfall averages around 30 inches annually. Humidity levels are generally high throughout the year, though it is usually more noticeable in warmer months due to increased evaporation rates.
Dennis, Massachusetts gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Dennis averages 25 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Dennis. The US average is 205 sunny days.
Dennis 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 79 degrees
Winter Low: the January low is 23
Rain: averages 47 inches of rain a year
Snow: averages 25 inches of snow a year