2025 Compare Climate & Weather:
Westford, MA vs Somerville, MA

Highlights

On average, there are 197 sunny days per year in Somerville. Westford averages 199 sunny days per year. The US average is 205 sunny days.

Somerville, Massachusetts gets 48 inches of rain, on average, per year. Westford, Massachusetts gets 48.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Somerville averages 51.4 inches of snow per year. Westford averages 56.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Somerville, Massachusetts
Summer High: the July high is around 82.4 degrees
Winter Low: the January low is 19.1
Rain: averages 48 inches of rain a year
Snow: averages 51.4 inches of snow a year

Westford, Massachusetts
Summer High: the July high is around 83.4 degrees
Winter Low: the January low is 15
Rain: averages 48.4 inches of rain a year
Snow: averages 56.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Westford is 6.8 (10=best), which means it is less comfortable than most places in Massachusetts.

Today's Weather - Westford, MA

68°F

Today's Weather - Somerville, MA

72°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Westford / Somerville

July is the hottest month for Westford with an average high temperature of 83.4°, which ranks it as one of the hottest places in Massachusetts. In Westford, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Westford are June, September and August.

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

January has the coldest nighttime temperatures for Westford with an average of 15.0°. This is colder than most places in Massachusetts.

January has the coldest nighttime temperatures for Somerville with an average of 19.1°. This is about average compared to other places in Massachusetts.

In Westford, there are 12.5 days annually when the high temperature is over 90°, which is one of the hottest places in Massachusetts.

In Somerville, there are 10.6 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

In Westford, there are 142.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Massachusetts.

In Somerville, there are 115.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Massachusetts.

In Westford, there are 5.4 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Massachusetts.

In Somerville, there are 1.9 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Massachusetts.

March is the wettest month in Westford 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 48.4 inches in Westford means that it is wetter than most places in Massachusetts.


March is the wettest month in Somerville 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 48.0 inches in Somerville means that it is about average compared to other places in Massachusetts.

May is the rainiest month in Westford with 12.5 days of rain, and September is the driest month with only 8.9 rainy days. There are 128.2 rainy days annually in Westford, 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 Somerville with 12.8 days of rain, and September is the driest month with only 9.2 rainy days. There are 133.6 rainy days annually in Somerville, which is one of the rainiest 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 56.1 inches in Westford means that it is one of the snowiest places in Massachusetts.

An annual snowfall of 51.4 inches in Somerville means that it is snowier than most places in Massachusetts.

January is the snowiest month in Westford with 16.9 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Somerville with 15.1 inches of snow, and 6 months of the year have significant snowfall.