Temperate rain forest
Overview
Temperate rainforest
Rainforest
Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

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are coniferous or broadleaf forests that occur in the temperate zone and receive high rainfall.
For temperate rain forests of North America, Alaback's definition is widely recognized:
Annual precipitation
Precipitation (meteorology)
In meteorology, precipitation In meteorology, precipitation In meteorology, precipitation (also known as one of the classes of hydrometeors, which are atmospheric water phenomena is any product of the condensation of atmospheric water vapor that falls under gravity. The main forms of precipitation...

 over 1400 mm
Mean annual temperature between 4 and 12 °C. (39 and 54 °F)

However, required annual precipitation depends on factors such as distribution of rainfall over the year, temperatures over the year and fog presence, and definitions in other countries differ considerably.
 
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