2025 Compare Climate & Weather:
Princeton, NJ vs Pasadena, CA

Highlights

On average, there are 286 sunny days per year in Pasadena. Princeton averages 204 sunny days per year. The US average is 205 sunny days.

Pasadena, California gets 21.4 inches of rain, on average, per year. Princeton, New Jersey gets 47.4 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. Princeton averages 24 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

Princeton, New Jersey
Summer High: the July high is around 85.6 degrees
Winter Low: the January low is 22
Rain: averages 47.4 inches of rain a year
Snow: averages 24 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 Princeton is 7.2 (10=best), which means it is about average compared to other places in New Jersey.

Today's Weather - Princeton, NJ

77°F

Today's Weather - Pasadena, CA

88°F

Average Monthly High / Low (°F)

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

July is the hottest month for Princeton with an average high temperature of 85.6°, which ranks it as warmer than most places in New Jersey. In Princeton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Princeton are September, June and August.

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.

January has the coldest nighttime temperatures for Princeton with an average of 22.0°. This is colder than most places in New Jersey.

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

In Princeton, there are 16.8 days annually when the high temperature is over 90°, which is about average compared to other places in New Jersey.

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 Princeton, there are 109.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New Jersey.

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 Princeton, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in New Jersey.

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.

July is the wettest month in Princeton with 5.1 inches of rain, and the driest month is February with 2.5 inches. The wettest season is Autumn with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 47.4 inches in Princeton means that it is about average compared to other places in New Jersey.


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.

May is the rainiest month in Princeton with 12.4 days of rain, and September is the driest month with only 8.7 rainy days. There are 124.6 rainy days annually in Princeton, which is one of the rainiest places in New Jersey. 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 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.

An annual snowfall of 24.0 inches in Princeton means that it is about average compared to other places in New Jersey.

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

February is the snowiest month in Princeton with 8.3 inches of snow, and 5 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Pasadena.