 Quilcene experiences an oceanic climate (Köppen climate classification "Cfb") and is almost categorised as part of the "Csb" climate category, receiving slightly more than , the threshold for "Cfb" inclusion.As of the 2010 census, 596 people lived in 312 households in the CDP, representing a population increase of 6 and a household increase of 69 over the 2000 census).With 123 children under the age of 18, 20.6% are school age or younger.