Average Monthly Sunshine in Yountville (CA)

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

Monthly hours of sunshine

Seasonal sunshine in Yountville varies. It peaks at 310 hours in May and drops to 160 hours in December. The total annual amount of sun is 0 hours.

Daily hours of sunshine

In Yountville, summer days are longer and more sunny, with daily sunshine hours peaking at 10.3 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.

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

Yountville enjoys an average of 0 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.

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

Oslo, Norway, receives approximately 1690 hours of sunshine annually.

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

Other climate information

December, Yountville’s wettest month, receives 0.2 mm of rainfall and has a maximum daytime temperature of 14°C. During the driest month August you can expect a temperature of 31°C.

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