Dartmouth, MA Climate

Dartmouth, MA has a humid continental climate characterized by hot and humid summers and cool to cold winters. July is typically the warmest month with temperatures averaging in the high 70s, while January and February are the coldest months with temperatures generally staying below freezing. Summers tend to be quite rainy while winters are generally dry. Snowfall is common during winter months and can contribute to icy road conditions, making winter driving difficult at times.

Dartmouth, Massachusetts gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Dartmouth averages 35 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 Dartmouth. The US average is 205 sunny days.

Dartmouth gets some kind of precipitation, on average, 128 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 82 degrees
Winter Low: the January low is 21
Rain: averages 50 inches of rain a year
Snow: averages 35 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Dartmouth is 7.0 (10=best), which means it is more comfortable than most places in Massachusetts.

9 Summer - 5.1 Winter

June, September and August are the most pleasant months in Dartmouth, while January and February are the least comfortable months.

Climate	Dartmouth, Massachusetts	United States
	49.6 in.	38.1 in.
	35.2 in.	27.8 in.
	128.3 days	106.2 days
	201 days	205 days
	81.9°	85.8°
	21.1°	21.7°
	7	7
	3.5	4.3
	84 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Dartmouth with an average high temperature of 81.9°, which ranks it as about average compared to other places in Massachusetts. In Dartmouth, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Dartmouth are June, August and July.

In Dartmouth, there are 6.4 days annually when the high temperature is over 90°, which is about average compared to other places in Massachusetts.

January has the coldest nighttime temperatures for Dartmouth with an average of 21.1°. This is warmer than most places in Massachusetts.

In Dartmouth, there are 110.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Massachusetts.

In Dartmouth, there are 1.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Massachusetts.

The humidity is usually comfortable in Dartmouth but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.

March is the wettest month in Dartmouth with 5.3 inches of rain, and the driest month is July with 3.3 inches. The wettest season is Summer with 27% of yearly precipitation and 23% occurs in Autumn, which is the driest season. The annual rainfall of 49.6 inches in Dartmouth means that it is wetter than most places in Massachusetts.

May is the rainiest month in Dartmouth with 12.1 days of rain, and September is the driest month with only 9.2 rainy days. There are 128.3 rainy days annually in Dartmouth, which is rainier than most places in Massachusetts. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 23% chance of a rainy day.

An annual snowfall of 35.2 inches in Dartmouth means that it is less snowy than most places in Massachusetts. January is the snowiest month in Dartmouth with 10.5 inches of snow, and 6 months of the year have significant snowfall.