San Ysidro (CA) Sunshine Hours by Month

To truly understand a climate, we must look at its sunshine. This page shows the total number of hours of direct sunlight per month and the average hours per day in San Ysidro, California, United States of America. The figures are based on a 30-year period (1990–2020) to provide a reliable average.

Monthly hours of sunshine

While the amount of sunshine in San Ysidro changes moderately throughout the year, the annual total remains impressive at around 3037 hours. Expect slightly brighter days in July and a subtle dip in January.

Daily hours of sunshine

The difference in daily sunshine hours between July (10.4 hours per day) and January (7.3 hours per day) offers moderate variety for visitors and residents.

Average percent of sunshine

On average the sun shines 81% of the time during the day in December, the highest percentage of any month. June has the lowest percentage at 56%.

San Ysidro enjoys an average of 3037 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.

In contrast, Brussels, Belgium, receives only about 1590 hours of sunshine per year, known for its frequently overcast and rainy skies.

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

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

December, San Ysidro’s wettest month, receives 4.1 mm (0.2 in) of rainfall and has a maximum daytime temperature of 19°C (66°F). During the driest month June you can expect a temperature of 23°C (73°F).

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