Fullerton (CA) Sunshine Hours by Month

In climate discussions, the hours of sunlight reveal much about a location. This page shows the total number of hours of direct sunlight per month and the average hours per day in Fullerton, California, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy.

Monthly hours of sunshine

Sunshine in Fullerton 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 3279 hours.

Daily hours of sunshine

For those who appreciate different seasons, Fullerton serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.3 hours of sunshine daily, and embrace the darker days in January, offering only 6.6 hours of daily sunlight.

Fullerton enjoys an average of 3279 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

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

In Seoul, South Korea, there are approximately 2133 hours of sunshine per year, mostly during spring and autumn.

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

December, Fullerton’s wettest month, receives 5.3 mm (0.2 in) of rainfall and has a maximum daytime temperature of 20°C (68°F). During the driest month August you can expect a temperature of 31°C (88°F).

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