2025 Compare Climate & Weather:
Boston, MA vs Acton, MA

Highlights

On average, there are 199 sunny days per year in Acton. Boston averages 200 sunny days per year. The US average is 205 sunny days.

Acton, Massachusetts gets 48 inches of rain, on average, per year. Boston, Massachusetts gets 47.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Acton averages 50.6 inches of snow per year. Boston averages 48.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Acton, Massachusetts
Summer High: the July high is around 83.1 degrees
Winter Low: the January low is 16.2
Rain: averages 48 inches of rain a year
Snow: averages 50.6 inches of snow a year

Boston, Massachusetts
Summer High: the July high is around 82.4 degrees
Winter Low: the January low is 19.2
Rain: averages 47.4 inches of rain a year
Snow: averages 48.1 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.

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

Today's Weather - Boston, MA

50°F

Today's Weather - Acton, MA

38°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boston / Acton

July is the hottest month for Boston with an average high temperature of 82.4°, which ranks it as warmer than most places in Massachusetts. In Boston, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boston are June, August and July.

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.

January has the coldest nighttime temperatures for Boston with an average of 19.2°. This is about average compared to other 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 Boston, there are 11.3 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

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

In Boston, there are 116.4 days annually when the nighttime low temperature falls below freezing, which is warmer 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 Boston, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other 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.

March is the wettest month in Boston with 4.6 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 47.4 inches in Boston means that it is drier than most places in Massachusetts.


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 Boston with 12.4 days of rain, and September is the driest month with only 8.9 rainy days. There are 130.0 rainy days annually in Boston, 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.

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 48.1 inches in Boston means that it is snowier than most places in Massachusetts.

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 Boston with 14.2 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Acton with 15.4 inches of snow, and 6 months of the year have significant snowfall.