Zip 90603 (Whittier, CA) Climate

The climate in Whittier, CA 90603 is generally mild and pleasant all year round. Summers typically reach highs in the mid-70s Fahrenheit (around 24 Celsius) while winters rarely drop below freezing, with temperatures usually hovering around the mid-50s (around 12 Celsius). The area gets about 18 inches of rain each year, mostly falling between October and March. The rest of the year is usually sunny with remarkably low humidity levels and plenty of sunshine.

Whittier (zip 90603), California gets 14 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Whittier (zip 90603) averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 278 sunny days per year in Whittier (zip 90603). The US average is 205 sunny days.

Whittier (zip 90603) gets some kind of precipitation, on average, 30 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 87 degrees
Winter Low: the January low is 47
Rain: averages 14 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 90603 zip code is 9.2 (10=best), which means it is one of the most pleasant places in California.

9.4 Summer - 8.9 Winter

June, May and October are the most pleasant months in the 90603 zip code, while January and December are the least comfortable months.

Climate	Whittier, California	United States
	14.3 in.	38.1 in.
	0.0 in.	27.8 in.
	29.7 days	106.2 days
	278 days	205 days
	87.1°	85.8°
	46.8°	21.7°
	9.2	7
	6.2	4.3
	337 ft.	2443 ft.

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 90603 zip code with an average high temperature of 89.0°, which ranks it as about average compared to other places in California. In the 90603 zip code, there are 9 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 90603 zip code are May, April and November.

In the 90603 zip code, there are 46.0 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 90603 zip code with an average of 46.0°. This is one of the warmest places in California.

In the 90603 zip code, there are 0.2 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In the 90603 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 90603 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 90603 zip code with 3.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 61% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 14.3 inches in the 90603 zip code means that it is drier than most places in California.

January is the rainiest month in the 90603 zip code with 5.8 days of rain, and August is the driest month with only 0.1 rainy days. There are 29.7 rainy days annually in the 90603 zip code, which is one of the least rainy places in California. The rainiest season is Spring when it rains 54% of the time and the driest is Autumn with only a 3% chance of a rainy day.

There is rarely any recorded snowfall in the 90603 zip code, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in the 90603 zip code.