Average Monthly Sunshine in Seattle (WA)

The graphs on this page shows the average number of hours per month and per day that Seattle 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 Seattle, timing is key. In July, you can enjoy up to 312 hours of sunshine, while the less sunny days of December provide just 54 hours. The total annual amount of sun is 2180 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.

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

Seattle enjoys an average of 2180 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

In contrast, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast, dark winter and rainy skies.

Boston, USA, enjoys 2629 hours of sunshine annually, with distinct seasons and many bright, sunny days.

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

Other climate information

November, Seattle’s wettest month, receives 14 mm of rainfall and has a maximum daytime temperature of 11°C. During the driest month July you can expect a temperature of 25°C.

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