Average Monthly Sunshine in Sonoma (CA)

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

Monthly hours of sunshine

Seasonal sunshine in Sonoma varies. It peaks at 310 hours in May and drops to 160 hours in December. The total annual amount of sun is 3042 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 10.3 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.3 hours of sunlight per day.

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

Sonoma enjoys an average of 3042 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, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.

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

Adelaide, Australia, enjoys 2770 hours of sunshine annually, with long, sunny summers.

Other climate information

December, Sonoma’s wettest month, receives 0.4 mm of rainfall and has a maximum daytime temperature of 14°C. During the driest month August you can expect a temperature of 29°C.

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