Plymouth County, MA Climate

Plymouth County, MA has a humid continental climate, with four distinct seasons of varying temperatures and precipitation. Summers are typically warm and humid, with average July highs reaching into the mid-70s. Winters in Plymouth County tend to be cold and snowy, with average January lows dipping into the 20s. Spring and autumn provide pleasant respites, with mild temperatures that range between the 40s and 70s. The driest months are usually February, November, and December; however rainfall can be heavy during any time of year. Overall Plymouth County enjoys a varied climate that offers plenty of opportunity for outdoor activities throughout the year.

Plymouth County, Massachusetts gets 51 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Plymouth County averages 39 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 Plymouth County. The US average is 205 sunny days.

Plymouth County gets some kind of precipitation, on average, 126 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 19
Rain: averages 51 inches of rain a year
Snow: averages 39 inches of snow a year

Bestplaces Comfort Index

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

9.1 Summer - 5 Winter

June, August and July are the most pleasant months in Plymouth County, while January and February are the least comfortable months.

Climate	Plymouth, Massachusetts	United States
	51.0 in.	38.1 in.
	39.4 in.	27.8 in.
	126.3 days	106.2 days
	201 days	205 days
	82.4°	85.8°
	18.8°	21.7°
	7	7
	3.3	4.3
	80 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 Plymouth County with an average high temperature of 82.4°, which ranks it as warmer than most places in Massachusetts. In Plymouth County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Plymouth County are June, August and July.

In Plymouth County, there are 8.3 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

January has the coldest nighttime temperatures for Plymouth County with an average of 18.8°. This is about average compared to other places in Massachusetts.

In Plymouth County, there are 126.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Massachusetts.

In Plymouth County, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Massachusetts.

The humidity is usually comfortable in Plymouth County 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 Plymouth County with 5.3 inches of rain, and the driest month is July with 3.7 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 51.0 inches in Plymouth County means that it is one of the wettest places in Massachusetts.

May is the rainiest month in Plymouth County with 11.7 days of rain, and September is the driest month with only 9.0 rainy days. There are 126.3 rainy days annually in Plymouth County, which is about average compared to other places in Massachusetts. The rainiest season is Summer when it rains 27% of the time and the driest is Autumn with only a 23% chance of a rainy day.

An annual snowfall of 39.4 inches in Plymouth County means that it is less snowy than most places in Massachusetts. January is the snowiest month in Plymouth County with 12.0 inches of snow, and 6 months of the year have significant snowfall.

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