2025 Compare Climate & Weather:
San Diego, CA vs Santa Clara, CA

Highlights

On average, there are 261 sunny days per year in Santa Clara. San Diego averages 266 sunny days per year. The US average is 205 sunny days.

Santa Clara, California gets 15.4 inches of rain, on average, per year. San Diego, California gets 11.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Santa Clara averages 0 inches of snow per year. San Diego averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Santa Clara, California
Summer High: the July high is around 80.3 degrees
Winter Low: the January low is 42.3
Rain: averages 15.4 inches of rain a year
Snow: averages 0 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Santa Clara is 8.8 (10=best), which means it is more comfortable than most places in California.

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.

Today's Weather - San Diego, CA

62°F

Today's Weather - Santa Clara, CA

64°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Diego / Santa Clara

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.

August is the hottest month for Santa Clara with an average high temperature of 80.4°, which ranks it as cooler than most places in California. In Santa Clara, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Santa Clara are June, September and July.

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

December has the coldest nighttime temperatures for Santa Clara with an average of 42.2°. This is warmer than most places in California.

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

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 Santa Clara, there are 2.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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.

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

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.


February is the wettest month in Santa Clara with 3.1 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 56% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 15.4 inches in Santa Clara means that it is drier than most places in California.

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.

December is the rainiest month in Santa Clara with 10.5 days of rain, and July is the driest month with only 0.2 rainy days. There are 62.6 rainy days annually in Santa Clara, which is rainier than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in San Diego.

Any measurable snowfall is a rare occurance in Santa Clara.