Seattle how many days of sunshine

This includes the three lakes that dictate the geography of the greater Seattle metropolitan area: Lakes Union, Washington and Sammamish. This same glacial activity also created the many islands that dot the Strait of Juan de Fuca and Puget Sound.

The result is a landscape that is ever changing and often breathtaking. The weather is relatively mild in Western Washington. Annual rainfall in the greater Seattle area is about 37 inches 94 cm. The Pacific Ocean creates a marine layer where clouds are frequent in the winter, spring and fall, but several days of steady rain is the exception rather than the rule.

Few homes have air-conditioning. The region is surrounded on all sides by mountains: the Olympic range to the west, Cascade range to the east, Mt.

Baker to the north and majestic Mt. East Oceania All the countries. In Seattle, the climate is sub-oceanic , with quite mild, rainy winters and mild, fairly sunny summers. THU Nov Heavy rain. FRI Nov SAT Nov Travel Inspiration. Grand Canyon. Grand Teton National Park Grand Teton National Park dominates the landscape with its amazing rough, snow-capped peaks that suddenly rise out of the heavens.

Report Conclusion. The Olympic rain shadow has a dramatic impact in the amount of incident light and number of sunny days recorded in locations like Sequim when compared to downtown Seattle.

The weather differences are most pronounced during the winter and spring seasons. Port Angeles also benefits strongly from the rain shadow, as do likely other areas such as Victoria, the southern San Juan Islands, and western Whidbey Island.

While this study focused on downtown Seattle, it is highly likely, if not certain, that many suburban areas of Seattle, especially those to the east, are even more dramatically less sunny than Olympic rain shadow areas during the winter and early spring.

We also have archived monthly rain shadow climate summaries and individual monthly reports with daily sunshine charts and radiation plots. Study Methodologies, Weather Stations, etc. The studies and live sunshine conditions on this website are based on examining incident solar radiation. Solar radiation is directly related to illuminance, a measure of how much light falls on a given area. Live sunshine conditions are calculated as follows:.

The website uses data from four different weather stations. The first station, the Sequim station , is located on the roof of a single story home on Jamestown Beach Rd, in Sequim, directly on the shores of the Strait of Juan de Fuca. This location may be very close to the epicenter of the Olympic Rain Shadow. As with many locations on the Dungeness plain in Sequim, this one is not shaded by tall trees, nor does it have any hills affecting its exposure. When the sun rises in the morning, it clears the horizon almost immediately as the areas to the south and east are open water.

When the sun sets in the evening, it sets to the west, over the Dungeness plain, so stays above the horizon for quite some time.