2025 Compare Climate & Weather:
Edison, NJ vs Chelmsford, MA

Highlights

On average, there are 201 sunny days per year in Chelmsford. Edison averages 206 sunny days per year. The US average is 205 sunny days.

Chelmsford, Massachusetts gets 47.2 inches of rain, on average, per year. Edison, New Jersey gets 48.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Chelmsford averages 56 inches of snow per year. Edison averages 24.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Chelmsford, Massachusetts
Summer High: the July high is around 83.3 degrees
Winter Low: the January low is 15.4
Rain: averages 47.2 inches of rain a year
Snow: averages 56 inches of snow a year

Edison, New Jersey
Summer High: the July high is around 86.3 degrees
Winter Low: the January low is 22.2
Rain: averages 48.4 inches of rain a year
Snow: averages 24.2 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Edison is 7.2 (10=best), which means it is about average compared to other places in New Jersey.

Today's Weather - Edison, NJ

60°F

Today's Weather - Chelmsford, MA

49°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Edison / Chelmsford

July is the hottest month for Edison with an average high temperature of 86.3°, which ranks it as warmer than most places in New Jersey. In Edison, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Edison are September, June and May.

July is the hottest month for Chelmsford with an average high temperature of 83.3°, which ranks it as one of the hottest places in Massachusetts. In Chelmsford, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chelmsford are June, August and September.

January has the coldest nighttime temperatures for Edison with an average of 22.2°. This is about average compared to other places in New Jersey.

January has the coldest nighttime temperatures for Chelmsford with an average of 15.4°. This is colder than most places in Massachusetts.

In Edison, there are 20.7 days annually when the high temperature is over 90°, which is hotter than most places in New Jersey.

In Chelmsford, there are 11.6 days annually when the high temperature is over 90°, which is one of the hottest places in Massachusetts.

In Edison, there are 107.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in New Jersey.

In Chelmsford, there are 139.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Massachusetts.

In Edison, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Jersey.

In Chelmsford, there are 5.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Massachusetts.

July is the wettest month in Edison with 5.3 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 48.4 inches in Edison means that it is wetter than most places in New Jersey.


October is the wettest month in Chelmsford with 4.4 inches of rain, and the driest month is February with 3.2 inches. The wettest season is Winter with 26% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 47.2 inches in Chelmsford means that it is drier than most places in Massachusetts.

May is the rainiest month in Edison with 11.3 days of rain, and September is the driest month with only 8.4 rainy days. There are 116.1 rainy days annually in Edison, which is about average compared to other places in New Jersey. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

May is the rainiest month in Chelmsford with 12.3 days of rain, and September is the driest month with only 8.8 rainy days. There are 126.0 rainy days annually in Chelmsford, which is about average compared to other places in Massachusetts. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 24% chance of a rainy day.

An annual snowfall of 24.2 inches in Edison means that it is about average compared to other places in New Jersey.

An annual snowfall of 56.0 inches in Chelmsford means that it is one of the snowiest places in Massachusetts.

February is the snowiest month in Edison with 8.1 inches of snow, and 5 months of the year have significant snowfall.

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