Pasadena (CA) Climate by Month
The temperature in Pasadena can vary greatly throughout the year.
The temperatures shift from very warm
to pleasant.
Pasadena has a dry climate with relatively low precipitation levels.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
Depending on the time of the year, temperatures range from very warm to pleasant in Pasadena. Average daytime temperatures range from a very warm 33°C in August, the warmest time of the year, to a pleasant 20°C during cooler months like December. At night, temperatures typically average around 8°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
With annual rainfall averaging 388 mm, Pasadena maintains relatively low precipitation levels throughout the seasons. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, December receives moderate rainfall, averaging 93 mm of precipitation, recorded across 8 rainy days. In contrast, the drier season, August brings less rainfall, with 0.4 mm over 0 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Pasadena. While July receives considerable daily sunshine with up to 12.1 hours, November marks the darkest time of the year, where sunshine is scarce with only 7.2 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Pasadena.
Relative humidity over the year
The best time of year to visit Pasadena in the United States of America
During the months of January, February, March, April, May and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Yes, the months of May, June, July, August, September and October are very dry.
August has an average maximum temperature of 33°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 20°C.
December tops the wettest month list with 93 mm of rainfall.
August is the driest month with 0 mm of precipitation.
July is the sunniest month with an average of 364 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
