2025 Compare Climate & Weather:
Boston, MA vs Key West, FL

Highlights

On average, there are 260 sunny days per year in Key West. Boston averages 200 sunny days per year. The US average is 205 sunny days.

Key West, Florida gets 43.8 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.

Key West averages 0 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

Key West, Florida
Summer High: the July high is around 89.4 degrees
Winter Low: the January low is 63.6
Rain: averages 43.8 inches of rain a year
Snow: averages 0 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 Key West is 6.1 (10=best), which means it is one of the least comfortable places in Florida.

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

57°F

Today's Weather - Key West, FL

76°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boston / Key West

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.

August is the hottest month for Key West with an average high temperature of 89.6°, which ranks it as one of the coolest places in Florida. In Key West, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Key West are March, February and December.

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 Key West with an average of 63.6°. This is one of the warmest places in Florida.

In Boston, there are 11.3 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

In Key West, there are 37.7 days annually when the high temperature is over 90°, which is one of the coolest places in Florida.

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 Key West, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

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 Key West, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Florida.

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.


September is the wettest month in Key West with 7.5 inches of rain, and the driest month is February with 1.8 inches. The wettest season is Autumn with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 43.8 inches in Key West means that it is one of the driest places in Florida.

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.

September is the rainiest month in Key West with 15.3 days of rain, and April is the driest month with only 4.4 rainy days. There are 102.0 rainy days annually in Key West, which is one of the least rainy places in Florida. The rainiest season is Autumn when it rains 35% of the time and the driest is Summer with only a 16% chance of a rainy day.

An annual snowfall of 48.1 inches in Boston means that it is snowier than most places in Massachusetts.

There is rarely any recorded snowfall in Key West, ranking it as one of the least snowy places in Florida.

January is the snowiest month in Boston with 14.2 inches of snow, and 6 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Key West.