Average Monthly Sunshine in Diamond Bar (CA)

The graphs on this page shows the average number of hours per month and per day that Diamond Bar receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Sunshine in Diamond Bar varies greatly throughout the year. The sunniest month, July, reaches an impressive 369 hours, while January, the darkest month, offers only 198 hours. The total annual amount of sun is 3277 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Diamond Bar. While July receives considerable daily sunshine with up to 12.3 hours, January marks the darkest time of the year, where sunshine is scarce with only 6.6 hours of sunlight per day.

Diamond Bar’s total hours of sunshine compared to other major cities

Diamond Bar enjoys an average of 3277 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

Osaka, Japan, experiences 2010 hours of sunshine annually, with bright, sunny weather in spring and autumn.

In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.

Other climate information

December, Diamond Bar’s wettest month, receives 0.2 mm of rainfall and has a maximum daytime temperature of 19°C. During the driest month June you can expect a temperature of 30°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Diamond Bar Precipitation page.