Average Monthly Sunshine in Sunnyvale (CA)

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

Monthly hours of sunshine

If you're visiting Sunnyvale, timing is key. In May, you can enjoy up to 324 hours of sunshine, while the shorter days of December provide just 160 hours. The total annual amount of sun is 3072 hours.

Daily hours of sunshine

In Sunnyvale, summer days are longer and more sunny, with daily sunshine hours peaking at 10.8 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.3 hours.

Sunnyvale’s total hours of sunshine compared to other major cities

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

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

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

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

Perth, Australia, enjoys 3180 hours of sunshine annually, the highest among major Australian cities.

Other climate information

December, Sunnyvale’s wettest month, receives 2.8 mm of rainfall and has a maximum daytime temperature of 15°C. During the driest month July you can expect a temperature of 26°C.

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