Chelsea, MA Climate


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United States / Massachusetts / Boston-Cambridge-Newton Metro Area / Suffolk County / Chelsea / Zip Codes
Chelsea, MA has a humid continental climate, characterized by cold winters and hot summers. Winters in Chelsea are mostly cloudy with occasional snowstorms and average temperatures ranging between 6 and 30 degrees Celsius. Summer temperatures can get quite hot, with an average high of around 80 degrees Celsius during the hottest months of July and August. Rainfall is spread evenly throughout the year, averaging just over four inches per month. Despite the occasional warm spells during summer, Chelsea remains relatively cool in comparison to other parts of Massachusetts due to its coastal location on Boston Harbor.

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

Chelsea averages 48 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Chelsea. The US average is 205 sunny days.

Chelsea gets some kind of precipitation, on average, 127 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 48 inches of rain a year
Snow: averages 48 inches of snow a year

Bestplaces Comfort Index

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

9.2 Summer - 4.9 Winter
August, June and September are the most pleasant months in Chelsea, while January and February are the least comfortable months.

  ClimateChelsea, MassachusettsUnited States
  47.9 in.38.1 in.
  47.5 in.27.8 in.
  127.0 days106.2 days
  202 days205 days
  82.2°85.8°
  19.2°21.7°
  77
  3.44.3
  39 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 Chelsea with an average high temperature of 82.2°, which ranks it as about average compared to other places in Massachusetts. In Chelsea, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chelsea are June, August and July.
In Chelsea, there are 10.6 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.
January has the coldest nighttime temperatures for Chelsea with an average of 19.2°. This is about average compared to other places in Massachusetts.
In Chelsea, there are 115.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Massachusetts.
In Chelsea, there are 1.9 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 Chelsea 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 Chelsea with 4.7 inches of rain, and the driest month is February with 3.5 inches. The wettest season is Summer with 26% of yearly precipitation and 24% occurs in Spring, which is the driest season. The annual rainfall of 47.9 inches in Chelsea means that it is about average compared to other places in Massachusetts.
May is the rainiest month in Chelsea with 12.2 days of rain, and September is the driest month with only 8.8 rainy days. There are 127.0 rainy days annually in Chelsea, 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 47.5 inches in Chelsea means that it is snowier than most places in Massachusetts. January is the snowiest month in Chelsea with 14.7 inches of snow, and 6 months of the year have significant snowfall.
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IDaveZ · Fort Worth, TX
Quality of Public School System
Over 15 years ago

I was born in Boston in 1946 and lived in Chelsea to age 10. I ended up getting my high school and university education in Texas. I wonder how the education system in  More

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