A temperate rain forest is an evergreen, broad-leaved, or coniferous forest which generally occurs in a coastal climate with cool to warm summers, mild winters, and year-round moisture abundance, often as fog. Broad-leaved temperate forests are found in areas including western Tasmania, southeastern Australia, New Zealand, Chile, southeastern China, and southern Japan. They often have close evolutionary ties to tropical and subtropical forests.

Temperate conifer rain forests are more cold-tolerant than broad-leaved rain forests and are rich in mosses while lacking tree ferns and vines. The original range of the temperate conifer rain forest included portions of Great Britain, Ireland, Norway, and the Pacific Coast of North America. The Pacific Northwest (PNW) rain forest extends from Northern California to the Gulf of Alaska and is the most extensive temperate rain forest in the world. The eastern boundary of the PNW forest is sometimes set...