The tropical rainforests of the world are located in the green areas on the map above. The tropical rainforest is the richest source of life on earth. It is a treasure chest of plant and animal life. The seasons do not change in the tropical rain forest. It has been hot and wet for millions of years. The average temperature year-round is about 80 degrees. The tropical rain forest is the wettest place on earth. It rains every day. In one year it may rain about 100 to 400 inches. This means that 9 to 30 feet of rain may fall each year. Rain forests even recycle their rain! As water evaporates from the forest back into the air, it forms clouds above the canopy. Later, the clouds will rain once again over the forest.