2025 Compare Climate & Weather:
Urban Honolulu, HI vs San Diego, CA

Highlights

On average, there are 266 sunny days per year in San Diego. Urban Honolulu averages 271 sunny days per year. The US average is 205 sunny days.

San Diego, California gets 11.7 inches of rain, on average, per year. Urban Honolulu, Hawaii gets 48.8 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. Urban Honolulu averages 0 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

Urban Honolulu, Hawaii
Summer High: the July high is around 84.9 degrees
Winter Low: the January low is 65.3
Rain: averages 48.8 inches of rain a year
Snow: averages 0 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 Honolulu is 8.3 (10=best), which means it is less comfortable than most places in Hawaii.

Today's Weather - Urban Honolulu, HI

85°F

Today's Weather - San Diego, CA

64°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Urban Honolulu / San Diego

September is the hottest month for Honolulu with an average high temperature of 85.8°, which ranks it as warmer than most places in Hawaii. In Honolulu, there are 10 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Honolulu are January, February and March.

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 Honolulu with an average of 65.3°. This is warmer than most places in Hawaii.

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 Honolulu, there are 7.8 days annually when the high temperature is over 90°, which is hotter than most places in Hawaii.

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 Honolulu, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Hawaii.

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

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.

December is the wettest month in Honolulu with 6.3 inches of rain, and the driest month is May with 2.7 inches. The wettest season is Spring with 31% of yearly precipitation and 19% occurs in Autumn, which is the driest season. The annual rainfall of 48.8 inches in Honolulu means that it is about average compared to other places in Hawaii.


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.

July is the rainiest month in Honolulu with 18.7 days of rain, and February is the driest month with only 12.6 rainy days. There are 194.9 rainy days annually in Honolulu, which is rainier than most places in Hawaii. The rainiest season is Autumn when it rains 27% of the time and the driest is Spring with only a 23% 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.

There is rarely any recorded snowfall in Honolulu, ranking it as one of the least snowy places in Hawaii.

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

Any measurable snowfall is a rare occurance in Honolulu.

Any measurable snowfall is a rare occurance in San Diego.