 According to the Köppen Climate Classification system, Centralia has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.Temperatures are usually quite mild, although Centralia is generally warmer in the summer and colder in the winter than locations further north along the Puget Sound.As of the census of 2010, there were 16,336 people, 6,640 households, and 3,867 families residing in the city.