Suffolk County, MA Climate

Suffolk, MA County has a humid continental climate with cold winters and hot summers. The average July temperature is 72°F (22°C) and the January low temperature is 22°F (-5°C). During the summer months, temperatures are moderated by cool breezes that come in off the Atlantic Ocean. Summers tend to be very hot and humid with short bouts of heavy rainfall. Winters are cold and snowy, with occasional snowstorms during the winter months. Spring offers mild temperatures but can be unpredictable at times due to changing weather patterns. Fall can bring a mix of cool temperatures with warmer days being common as well.

Suffolk County, Massachusetts gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Suffolk County averages 48 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 Suffolk County. The US average is 205 sunny days.

Suffolk County gets some kind of precipitation, on average, 131 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 83 degrees
Winter Low: the January low is 20
Rain: averages 48 inches of rain a year
Snow: averages 48 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Suffolk County is 6.9 (10=best), which means it is about average compared to other places in Massachusetts.

9.2 Summer - 4.9 Winter

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

Climate	Suffolk, Massachusetts	United States
	Unlock	38.1 in.
	48.4 in.	Unlock
	Unlock	106.2 days
	201 days	Unlock
	82.5°	85.8°
	Unlock	21.7°
	6.9	Unlock
	Unlock	4.3
	58 ft.	Unlock

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 Suffolk County with an average high temperature of 82.5°, which ranks it as warmer than most places in Massachusetts. In Suffolk County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Suffolk County are June, August and July.

In Suffolk County, there are 11.1 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

January has the coldest nighttime temperatures for Suffolk County with an average of 19.5°. This is warmer than most places in Massachusetts.

In Suffolk County, there are 114.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Massachusetts.

In Suffolk County, there are 1.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Massachusetts.

The humidity is usually comfortable in Suffolk 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 Suffolk County with 4.6 inches of rain, and the driest month is February with 3.5 inches. The wettest season is Winter with 26% of yearly precipitation and 24% occurs in Spring, which is the driest season. The annual rainfall of 47.7 inches in Suffolk County means that it is about average compared to other places in Massachusetts.

May is the rainiest month in Suffolk County with 12.4 days of rain, and September is the driest month with only 9.0 rainy days. There are 130.6 rainy days annually in Suffolk County, which is rainier than most places in Massachusetts. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 48.4 inches in Suffolk County means that it is snowier than most places in Massachusetts. January is the snowiest month in Suffolk County with 14.3 inches of snow, and 6 months of the year have significant snowfall.

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