What makes a temperate rainforest, a temperate rainforest: 🌧️ the forest must have annual precipitation of at least 140 cm (55 inches) 🌡️ average annual temperatures must range between 4-12 degrees Celsius (39-54 degrees Fahrenheit) Temperate rainforests contain coniferous trees (evergreens), such as massive western red cedars, and deciduous trees (which loose their leaves) like big leaf maple trees. Although temperate rainforests are less biodiverse than tropical rainforests, they are tremend