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

Highlights

On average, there are 251 sunny days per year in Siesta Key. Boston averages 200 sunny days per year. The US average is 205 sunny days.

Siesta Key, Florida gets 53.2 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.

Siesta Key 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

Siesta Key, Florida
Summer High: the July high is around 90.4 degrees
Winter Low: the January low is 51.6
Rain: averages 53.2 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 Siesta Key is 6.8 (10=best), which means it is about average compared to other 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

55°F

Today's Weather - Siesta Key, FL

74°F

Average Monthly High / Low (°F)

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

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 Siesta Key with an average high temperature of 90.5°, which ranks it as cooler than most places in Florida. In Siesta Key, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Siesta Key are November, March and April.

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 Siesta Key with an average of 51.6°. This is warmer than most 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 Siesta Key, there are 70.2 days annually when the high temperature is over 90°, which is about average compared to other 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 Siesta Key, there are 1.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most 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 Siesta Key, 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.


August is the wettest month in Siesta Key with 8.9 inches of rain, and the driest month is November with 2.0 inches. The wettest season is Autumn with 47% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 53.2 inches in Siesta Key means that it is about average compared to other 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.

August is the rainiest month in Siesta Key with 16.2 days of rain, and April is the driest month with only 4.8 rainy days. There are 106.0 rainy days annually in Siesta Key, which is less rainy than most places in Florida. The rainiest season is Autumn when it rains 42% of the time and the driest is Summer with only a 15% 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 Siesta Key, 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 Siesta Key.