2025 Compare Climate & Weather:
San Rafael, CA vs Aiea, HI

Highlights

On average, there are 275 sunny days per year in Aiea. San Rafael averages 256 sunny days per year. The US average is 205 sunny days.

Aiea, Hawaii gets 60.7 inches of rain, on average, per year. San Rafael, California gets 40.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Aiea averages 0 inches of snow per year. San Rafael averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Aiea, Hawaii
Summer High: the July high is around 84.1 degrees
Winter Low: the January low is 65.6
Rain: averages 60.7 inches of rain a year
Snow: averages 0 inches of snow a year

San Rafael, California
Summer High: the July high is around 78.1 degrees
Winter Low: the January low is 42
Rain: averages 40.6 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Aiea is 8.4 (10=best), which means it is less comfortable than most places in Hawaii.

The annual BestPlaces Comfort Index for San Rafael is 8.5 (10=best), which means it is more comfortable than most places in California.

Today's Weather - Aiea, HI

74°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Rafael / Aiea

August is the hottest month for San Rafael with an average high temperature of 78.3°, which ranks it as cooler than most places in California. In San Rafael, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Rafael are July, September and August.

August is the hottest month for Aiea with an average high temperature of 85.1°, which ranks it as about average compared to other places in Hawaii. In Aiea, there are 11 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Aiea are February, January and March.

January has the coldest nighttime temperatures for San Rafael with an average of 42.0°. This is warmer than most places in California.

January has the coldest nighttime temperatures for Aiea with an average of 65.6°. This is one of the warmest places in Hawaii.

In San Rafael, there are 12.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Aiea, there are 6.2 days annually when the high temperature is over 90°, which is hotter than most places in Hawaii.

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

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

December is the wettest month in San Rafael with 8.3 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 40.6 inches in San Rafael means that it is wetter than most places in California.


November is the wettest month in Aiea with 7.4 inches of rain, and the driest month is June with 3.2 inches. The wettest season is Spring with 30% of yearly precipitation and 18% occurs in Autumn, which is the driest season. The annual rainfall of 60.7 inches in Aiea means that it is wetter than most places in Hawaii.

January is the rainiest month in San Rafael with 12.8 days of rain, and July is the driest month with only 0.8 rainy days. There are 77.1 rainy days annually in San Rafael, which is rainier 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 5% chance of a rainy day.

July is the rainiest month in Aiea with 21.7 days of rain, and February is the driest month with only 14.4 rainy days. There are 224.6 rainy days annually in Aiea, 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.

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

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

Any measurable snowfall is a rare occurance in San Rafael.

Any measurable snowfall is a rare occurance in Aiea.