Average Monthly Sunshine in Guerneville (CA)

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

Monthly hours of sunshine

Sunshine in Guerneville varies greatly throughout the year. The sunniest month, May, reaches an impressive 310 hours, while December, the darkest month, offers only 160 hours. The total annual amount of sun is 0 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Guerneville. While May receives considerable daily sunshine with up to 10.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.3 hours of sunlight per day.

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

Guerneville enjoys an average of 0 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

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.

In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.

Other climate information

December, Guerneville’s wettest month, receives 0.9 mm of rainfall and has a maximum daytime temperature of 14°C. During the driest month July you can expect a temperature of 28°C.

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