Acton, MA Climate

Acton, MA has a humid continental climate, with warm summers and cold winters. The average annual temperature is 47 degrees Fahrenheit, and the average amount of precipitation is 48 inches each year. In the summer months, temperatures can reach up to 86 degrees Fahrenheit and in the winter they can drop down to below 0 degrees Fahrenheit. The area receives an average of 89 days with measurable precipitation each year, making it one of the wettest areas in Massachusetts.

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

Acton averages 51 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Acton. The US average is 205 sunny days.

Acton gets some kind of precipitation, on average, 129 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 16
Rain: averages 48 inches of rain a year
Snow: averages 51 inches of snow a year

Bestplaces Comfort Index

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

9.2 Summer - 4.7 Winter

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

Climate	Acton, Massachusetts	United States
	48.0 in.	38.1 in.
	50.6 in.	27.8 in.
	128.6 days	106.2 days
	199 days	205 days
	83.1°	85.8°
	16.2°	21.7°
	6.9	7
	3.5	4.3
	266 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 Acton with an average high temperature of 83.1°, which ranks it as warmer than most places in Massachusetts. In Acton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Acton are June, August and September.

In Acton, there are 11.4 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

January has the coldest nighttime temperatures for Acton with an average of 16.2°. This is colder than most places in Massachusetts.

In Acton, there are 133.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Massachusetts.

In Acton, there are 4.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Massachusetts.

Humidity in Acton is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.

March is the wettest month in Acton with 4.6 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Summer with 26% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 48.0 inches in Acton means that it is about average compared to other places in Massachusetts.

May is the rainiest month in Acton with 12.6 days of rain, and September is the driest month with only 8.9 rainy days. There are 128.6 rainy days annually in Acton, 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 50.6 inches in Acton means that it is snowier than most places in Massachusetts. January is the snowiest month in Acton with 15.4 inches of snow, and 6 months of the year have significant snowfall.