Pasadena (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Pasadena.
Climate overview of Pasadena
Pasadena, California, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 33°C (91°F) in August, while winters cool to 20°C (68°F) in December.
Rainfall is modest, totalling around 388 mm (15 in) annually. The city experiences a distinct dry season from April to November. December tends to be the wettest month. The sunniest month is July, with 12.1 hours of sunshine per day on average.
Pasadena Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Pasadena — and find the best time to visit.
Monthly Temperature in Pasadena
Depending on the time of the year, temperatures range from very warm to pleasant in Pasadena. Average maximum daytime temperatures range from a very warm 33°C (91°F) in August, the warmest time of the year, to a pleasant 20°C (68°F) during cooler months like December.
At night, you can expect temperatures ranging from 18°C (64°F) in August to around 8°C (46°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Pasadena
With annual rainfall averaging 388 mm (15 in), Pasadena maintains relatively low precipitation levels throughout the seasons. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 93 mm (3.7 in) of precipitation, recorded across 8 rainy days. In contrast, the driest month August brings less rainfall, with 0.4 mm (0.02 in) over 0 rainy days. For more details, please visit our Pasadena Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Pasadena
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.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Pasadena by Month
The relative humidity is high throughout the year in Pasadena.
The city experiences its highest humidity in May, reaching 73%. In November, the humidity drops to its lowest level at 50%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Pasadena
Rainfall during this time ranges from 12 mm (0.5 in) in May to 93 mm (3.7 in) in December. This means you can expect a mix of sunny days and occasional showers. Looking for inspiration on where to travel this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
Frequently asked questions about the climate in Pasadena
What is the best time to visit Pasadena?
January, February, March, April, May, June, October, November and December typically offer the most optimal weather in Pasadena. In contrast, August tends to have less optimal conditions. Pasadena has a distinct dry season from April to November.
What temperatures can I expect in Pasadena?
Daytime highs range from 20°C (68°F) in December to 33°C (91°F) in August. Nighttime lows range from 8°C (46°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Pasadena get?
Annual rainfall is around 388 mm (15 in). December is the wettest month with 93 mm (3.7 in), while August is the driest with 0.4 mm (0.02 in).
How sunny is Pasadena?
Pasadena receives around 3,257 hours of sunshine per year. July is the sunniest month with 364 hours, while November is the cloudiest with just 217 hours. Overall, Pasadena enjoys abundant sunshine.
Pasadena 3-Day Forecast
Pasadena (CA) 3-Day Forecast
Pasadena on the map
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