2025 Compare Climate & Weather:
Hilo, HI vs Pasadena, CA

Highlights

On average, there are 286 sunny days per year in Pasadena. Hilo averages 175 sunny days per year. The US average is 205 sunny days.

Pasadena, California gets 21.4 inches of rain, on average, per year. Hilo, Hawaii gets 143.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Pasadena averages 0 inches of snow per year. Hilo averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Pasadena, California
Summer High: the July high is around 87.5 degrees
Winter Low: the January low is 45.1
Rain: averages 21.4 inches of rain a year
Snow: averages 0 inches of snow a year

Hilo, Hawaii
Summer High: the July high is around 81 degrees
Winter Low: the January low is 63
Rain: averages 143.1 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Pasadena is 9.1 (10=best), which means it is one of the most pleasant places in California.

The annual BestPlaces Comfort Index for Hilo is 8.6 (10=best), which means it is less comfortable than most places in Hawaii.

Today's Weather - Hilo, HI

67°F

Today's Weather - Pasadena, CA

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Hilo / Pasadena

September is the hottest month for Hilo with an average high temperature of 81.7°, which ranks it as cooler than most places in Hawaii. In Hilo, there are 12 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hilo are December, April and March.

August is the hottest month for Pasadena with an average high temperature of 89.1°, which ranks it as about average compared to other places in California. In Pasadena, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Pasadena are May, October and June.

February has the coldest nighttime temperatures for Hilo with an average of 62.8°. This is about average compared to other places in Hawaii.

December has the coldest nighttime temperatures for Pasadena with an average of 44.3°. This is warmer than most places in California.

In Hilo, there are 0.0 days annually when the high temperature is over 90°, which is cooler than most places in Hawaii.

In Pasadena, there are 49.6 days annually when the high temperature is over 90°, which is about average compared to other places in California.

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

In Pasadena, there are 1.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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

November is the wettest month in Hilo with 15.9 inches of rain, and the driest month is June with 8.4 inches. The wettest season is Winter with 27% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 143.1 inches in Hilo means that it is one of the wettest places in Hawaii.


February is the wettest month in Pasadena with 5.2 inches of rain, and the driest month is July with 0.1 inches. The wettest season is Spring with 59% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 21.4 inches in Pasadena means that it is wetter than most places in California.

April is the rainiest month in Hilo with 21.9 days of rain, and February is the driest month with only 14.9 rainy days. There are 235.8 rainy days annually in Hilo, 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 21% chance of a rainy day.

February is the rainiest month in Pasadena with 6.8 days of rain, and July is the driest month with only 0.5 rainy days. There are 39.7 rainy days annually in Pasadena, which is less rainy than most places in California. The rainiest season is Spring when it rains 46% of the time and the driest is Autumn with only a 6% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Hilo.

Any measurable snowfall is a rare occurance in Pasadena.