Temperate rainforests are located in temperate regions, such as the Pacific Northwest, Alaska, Canada, New Zealand, East Asia, Australia and Europe. Most temperate rainforests are located along the coastline of temperate regions, where the mountain ranges trap moisture from the air masses that rise from the ocean. The trapped moisture condenses into rain and creates a lush rainforest.
The large amount of precipitation caused by the condensed moisture in the Pacific formed the largest temperate rainforest along the Pacific coast of North America. This temperate rainforest makes it possible for enormous redwood trees to grow in Northern California. The amount of biomass produced by temperate rainforests exceeds that of tropical rainforests due to the sizes of trees that grow in these temperate mountain ranges.
The same mountains that block the moisture from the ocean also protect temperate rainforests from extreme temperatures. Their climate is mild throughout the year. The rainforest receives about 200 inches of rain annually. There are two seasons in a temperate rainforest: a long, wet season where temperatures drop to near freezing and a short dry season where temperatures reach 80 degrees Fahrenheit. The coldness during winter makes decomposition slower in temperate rainforests, creating a large amount of biomass in the forest floor.