Average Monthly Sunshine in Castro Valley (CA)

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

Monthly hours of sunshine

Those who love seasonal contrasts will appreciate Castro Valley. Expect long, bright days with 324 hours in May and darker periods with just 160 hours in December. The total annual amount of sun is 3072 hours.

Daily hours of sunshine

This means the city can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 10.8 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.3 hours of sunlight per day.

Castro Valley’s total hours of sunshine compared to other major cities

Castro Valley enjoys an average of 3072 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Seville, Spain, enjoys an impressive 2920 hours of sunshine per year, making it an ideal destination even in winter.

Toronto, Canada, sees around 2071 hours of sunshine each year, with especially long, bright summer days.

In Shanghai, China, the annual average sunshine is 1780 hours, with cloudier weather in summer.

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

Other climate information

December, Castro Valley’s wettest month, receives 4.2 mm of rainfall and has a maximum daytime temperature of 14°C. During the driest month August you can expect a temperature of 24°C.

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