The Sequim plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
Showers likely
Showers likely
Chance of showers
Chance of showers
Chance of showers
Partly cloudy
Partly cloudy
64° on Nov. 17, 2020, the hottest reading for this week of the year since 1980. Next is 62° in 1990.
Sequim’s center stands about 180 ft above sea level. Within three miles the land runs from 0 ft to 1,030 ft, a difference of 1,030 ft: steep hill country. The highest named summit within 15 miles is Gray Wolf, about 7,180 ft, 15 miles south-southwest.
Under the town center the state geologic map shows Oligocene-Miocene marine rocks (sandstone, conglomerate, conglomerate-sandstone), from the Late Eocene to Miocene, 5.3 to 38 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, sandstone. Age: Middle Eocene to Late Eocene, 34 to 48 million years old. About 4 mi of the line.
Sandstone, siltstone. Age: Middle Eocene to Early Miocene, 16 to 48 million years old. About 3 mi of the line.
Basalt. Age: Early Paleocene to Middle Eocene, 40 to 64 million years old. About 3 mi of the line.
Sand, gravel. Age: Pleistocene, less than 2.6 million years old. About 3 mi of the line.
Sandstone. Age: Triassic to Late Eocene, 34 to 252 million years old. About 2 mi of the line.
Sandstone, conglomerate, conglomerate-sandstone. Age: Late Eocene to Miocene, 5.3 to 38 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
Rain that falls on Sequim runs only a short way, about 2 miles, to Puget Sound and the Pacific Ocean.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sequim; river miles along the main stem, rounded.
Sequim has a warm-summer Mediterranean climate. Summer afternoons average 70° in July; winter nights fall to about 32° in January. About 17 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Sequim normally reaches 51° and falls to 35°. The record high is 62°, in 2004; the record low 20°, in 2014. The most rain on this date, 0.94 in, fell in 2015.
Normals 1991–2020 and records since 1980 at Sequim 2 E, here, 130 ft lower. NOAA, through RCC-ACIS.
