2025 Compare Climate & Weather:
Tucson, AZ vs Pasadena, CA

Highlights

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

Pasadena, California gets 21.4 inches of rain, on average, per year. Tucson, Arizona gets 12.3 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. Tucson averages 0.4 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

Tucson, Arizona
Summer High: the July high is around 100.2 degrees
Winter Low: the January low is 38.7
Rain: averages 12.3 inches of rain a year
Snow: averages 0.4 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 Tucson is 7.5 (10=best), which means it is about average compared to other places in Arizona.

Today's Weather - Tucson, AZ

90°F

Today's Weather - Pasadena, CA

72°F

Average Monthly High / Low (°F)

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

June is the hottest month for Tucson with an average high temperature of 100.5°, which ranks it as warmer than most places in Arizona. In Tucson, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Tucson are March, November and April.

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.

December has the coldest nighttime temperatures for Tucson with an average of 38.0°. This is warmer than most places in Arizona.

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

In Tucson, there are 149.2 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

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 Tucson, there are 17.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

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

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.

August is the wettest month in Tucson with 2.4 inches of rain, and the driest month is May with 0.2 inches. The wettest season is Autumn with 40% of yearly precipitation and 11% occurs in Summer, which is the driest season. The annual rainfall of 12.3 inches in Tucson means that it is about average compared to other places in Arizona.


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.

August is the rainiest month in Tucson with 9.5 days of rain, and June is the driest month with only 1.4 rainy days. There are 51.5 rainy days annually in Tucson, which is about average compared to other places in Arizona. The rainiest season is Autumn when it rains 38% of the time and the driest is Summer with only a 15% 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 0.4 inches in Tucson means that it is about average compared to other places in Arizona.

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

January is the snowiest month in Tucson with 0.2 inches of snow, and no months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Pasadena.