Diamond Bar, CA Climate


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United States / California / Los Angeles-Long Beach-Anaheim Metro Area / Los Angeles County / Diamond Bar / Zip Codes
Diamond Bar, CA has a Mediterranean climate featuring mild winters and warm, dry summers. Average high temperatures in the summer are usually between 75 and 90 degrees Fahrenheit, while winter averages range from 45 to 65 degrees Fahrenheit. The city also gets an average of 13 inches of rain per year making it a relatively dry region. With its mild temperatures and low rainfall, Diamond Bar is an ideal place to live for those who enjoy sunny days with cool evenings.

Diamond Bar, California gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Diamond Bar averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 286 sunny days per year in Diamond Bar. The US average is 205 sunny days.

Diamond Bar gets some kind of precipitation, on average, 32 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 91 degrees
Winter Low: the January low is 43
Rain: averages 19 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Diamond Bar is 8.8 (10=best), which means it is more comfortable than most places in California.

8.7 Summer - 8.5 Winter
May, June and October are the most pleasant months in Diamond Bar, while August and January are the least comfortable months.

  ClimateDiamond Bar, CaliforniaUnited States
  18.8 in.38.1 in.
  0.0 in.27.8 in.
  32.3 days106.2 days
  286 days205 days
  90.9°85.8°
  42.5°21.7°
  8.87
  6.24.3
  696 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 Diamond Bar with an average high temperature of 92.6°, which ranks it as about average compared to other places in California. In Diamond Bar, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Diamond Bar are May, October and April.
In Diamond Bar, there are 72.5 days annually when the high temperature is over 90°, which is hotter than most places in California.
December has the coldest nighttime temperatures for Diamond Bar with an average of 41.3°. This is warmer than most places in California.
In Diamond Bar, there are 4.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.
In Diamond Bar, 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 Diamond Bar 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 Diamond Bar with 4.7 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 18.8 inches in Diamond Bar means that it is about average compared to other places in California.
February is the rainiest month in Diamond Bar with 5.9 days of rain, and July is the driest month with only 0.2 rainy days. There are 32.3 rainy days annually in Diamond Bar, which is less rainy than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 4% chance of a rainy day.
There is rarely any recorded snowfall in Diamond Bar, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in Diamond Bar.
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EG · Brea, CA
Diamond Bar is beautiful
Over 13 years ago

Beautiful city and great place to raise a family. The worst part of Diamond Bar would be some of the best places to live in other cities. Diamond Bar has some of the  More

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EG · Brea, CA
Diamond Bar is beautiful
Over 13 years ago

The city is centrally located to riverside, San Bernardino, Orange County and Downtown La. It is very scenic with beautiful hills, great schools and within easy reach,  More

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RICHARD · Walnut, CA
NFL
Over 14 years ago

This is a very quiet area about 30 mile east of downtown Los Angeles. I'm a bit concerned about what effect a possible new NFL stadium in the City of Industry CA will  More

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