Zip 91103 (Pasadena, CA) Climate

Pasadena, CA 91103 has a warm climate year round with hot summers and mild winters. The average high temperature in the summer is around 90 degrees Fahrenheit while the average low temperature in the winter is around 45 degrees Fahrenheit. Average precipitation is low throughout the year, with occasional rain showers during late fall and early spring. During summer months, humidity can be high due to nearby ocean breezes, making it feel warmer than it actually is. Overall, Pasadena is sunny and pleasant most of the time, making it an ideal destination for outdoor activities or simply enjoying some sunshine.

Pasadena (zip 91103), California gets 22 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Pasadena (zip 91103) averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 292 sunny days per year in Pasadena (zip 91103). The US average is 205 sunny days.

Pasadena (zip 91103) gets some kind of precipitation, on average, 40 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 89 degrees
Winter Low: the January low is 45
Rain: averages 22 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 91103 zip code is 9.0 (10=best), which means it is more comfortable than most places in California.

9.1 Summer - 8.7 Winter

June, May and October are the most pleasant months in the 91103 zip code, while January and February are the least comfortable months.

Climate	Pasadena, California	United States
	Unlock	38.1 in.
	0.0 in.	Unlock
	Unlock	106.2 days
	292 days	Unlock
	88.6°	85.8°
	Unlock	21.7°
	9	Unlock
	Unlock	4.3
	958 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for the 91103 zip code with an average high temperature of 90.3°, which ranks it as about average compared to other places in California. In the 91103 zip code, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 91103 zip code are May, October and April.

In the 91103 zip code, there are 57.3 days annually when the high temperature is over 90°, which is about average compared to other places in California.

December has the coldest nighttime temperatures for the 91103 zip code with an average of 44.6°. This is warmer than most places in California.

In the 91103 zip code, there are 1.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In the 91103 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

Humidity in the 91103 zip code is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.

February is the wettest month in the 91103 zip code with 5.4 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 22.2 inches in the 91103 zip code means that it is wetter than most places in California.

February is the rainiest month in the 91103 zip code with 6.6 days of rain, and July is the driest month with only 0.5 rainy days. There are 39.6 rainy days annually in the 91103 zip code, which is less rainy than most places in California. The rainiest season is Spring when it rains 45% of the time and the driest is Autumn with only a 6% chance of a rainy day.

There is rarely any recorded snowfall in the 91103 zip code, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in the 91103 zip code.

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