South Dennis, MA has an average climate that can be described as temperate and humid. Summers are generally warm with temperatures ranging from the mid-70s to the upper-80s Fahrenheit. Winters tend to be cold with temperatures usually around the upper-20s or lower-30s Fahrenheit. Spring and fall are mild with temperatures between the low-50s to mid-70s Fahrenheit. Rainfall is abundant throughout the year, with more precipitation during summer months. Snowfall is also common in winter, especially during late December through March.
South Dennis, Massachusetts gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.
South Dennis averages 26 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 200 sunny days per year in South Dennis. The US average is 205 sunny days.
South 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 46 inches of rain a year
Snow: averages 26 inches of snow a year