2025 Compare Climate & Weather:
Boston, MA vs Los Altos, CA

Highlights

On average, there are 263 sunny days per year in Los Altos. Boston averages 200 sunny days per year. The US average is 205 sunny days.

Los Altos, California gets 18.8 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.

Los Altos 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

Los Altos, California
Summer High: the July high is around 80.9 degrees
Winter Low: the January low is 39.9
Rain: averages 18.8 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 Los Altos is 8.7 (10=best), which means it is more comfortable than most places in California.

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

64°F

Today's Weather - Los Altos, CA

72°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boston / Los Altos

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 Los Altos with an average high temperature of 80.9°, which ranks it as cooler than most places in California. In Los Altos, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Los Altos are June, September and August.

January has the coldest nighttime temperatures for Boston with an average of 19.2°. This is about average compared to other places in Massachusetts.

December has the coldest nighttime temperatures for Los Altos with an average of 39.7°. This is warmer than most places in California.

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

In Los Altos, there are 17.6 days annually when the high temperature is over 90°, which is cooler than most places in California.

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 Los Altos, there are 10.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

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.


February is the wettest month in Los Altos with 3.9 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 18.8 inches in Los Altos means that it is about average compared to other places in California.

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.

January is the rainiest month in Los Altos with 10.4 days of rain, and July is the driest month with only 0.1 rainy days. There are 60.9 rainy days annually in Los Altos, which is about average compared to other places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 2% 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 Los Altos, ranking it as one of the least snowy places in California.

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 Los Altos.