2025 Compare Climate & Weather:
Washington, DC vs San Diego, CA

Highlights

On average, there are 266 sunny days per year in San Diego. Washington averages 203 sunny days per year. The US average is 205 sunny days.

San Diego, California gets 11.7 inches of rain, on average, per year. Washington, District of Columbia gets 43.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

San Diego averages 0 inches of snow per year. Washington averages 13.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

San Diego, California
Summer High: the July high is around 78.5 degrees
Winter Low: the January low is 45.6
Rain: averages 11.7 inches of rain a year
Snow: averages 0 inches of snow a year

Washington, District of Columbia
Summer High: the July high is around 88.5 degrees
Winter Low: the January low is 26.5
Rain: averages 43.3 inches of rain a year
Snow: averages 13.7 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for San Diego is 9.2 (10=best), which means it is one of the most pleasant places in California.

The annual BestPlaces Comfort Index for Washington is 7.3 (10=best), which means it is one of the most pleasant places in the District of Columbia.

Today's Weather - Washington, DC

82°F

Today's Weather - San Diego, CA

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Washington / San Diego

July is the hottest month for Washington with an average high temperature of 88.5°, which ranks it as one of the hottest places in the District of Columbia. In Washington, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Washington are September, May and June.

August is the hottest month for San Diego with an average high temperature of 80.2°, which ranks it as cooler than most places in California. In San Diego, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Diego are July, September and August.

January has the coldest nighttime temperatures for Washington with an average of 26.5°. This is one of the warmest places in the District of Columbia.

December has the coldest nighttime temperatures for San Diego with an average of 45.3°. This is one of the warmest places in California.

In Washington, there are 35.8 days annually when the high temperature is over 90°, which is one of the hottest places in the District of Columbia.

In San Diego, there are 13.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Washington, there are 79.3 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in the District of Columbia.

In San Diego, there are 0.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In Washington, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in the District of Columbia.

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

July is the wettest month in Washington with 4.4 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 43.3 inches in Washington means that it is one of the wettest places in the District of Columbia.


February is the wettest month in San Diego with 2.5 inches of rain, and the driest month is August with 0.0 inches. The wettest season is Spring with 55% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 11.7 inches in San Diego means that it is drier than most places in California.

May is the rainiest month in Washington with 11.5 days of rain, and October is the driest month with only 8.1 rainy days. There are 114.3 rainy days annually in Washington, which is one of the rainiest places in the District of Columbia. 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.

February is the rainiest month in San Diego with 6.8 days of rain, and August is the driest month with only 0.4 rainy days. There are 38.4 rainy days annually in San Diego, which is less rainy than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 4% chance of a rainy day.

An annual snowfall of 13.7 inches in Washington means that it is one of the snowiest places in the District of Columbia.

There is rarely any recorded snowfall in San Diego, ranking it as one of the least snowy places in California.

January is the snowiest month in Washington with 5.5 inches of snow, and 5 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in San Diego.