Sequim (listen) is a city in Clallam County, Washington, United States. The 2010 census counted a population of 6,606. The population served by the Sequim School District was close to 29,000 in 2018. Sequim is located along the Dungeness River near the base of the Olympic Mountains.
Sequim lies within the rain shadow of the Olympic Mountains and receives on average less than 16 inches (410 mm) of rain per year – about the same as Los Angeles, California – leading it to give itself the nickname of Sunny Sequim. However, the city is relatively close to some of the wettest temperate rainforests of the contiguous United States. This climate anomaly is sometimes called the "Blue Hole of Sequim". Fogs and cool breezes from the Juan de Fuca Strait make Sequim's climate more humid than would be expected from the low average annual precipitation. Some places have surprisingly luxuriant forests dominated by Douglas-fir and western red cedar. Black cottonwood, red alder, bigleaf maple, Pacific madrone, lodgepole pine, and Garry oak can also be large.