by Renold Capocasale The Napo rainforest is centered around the Rio Napo watershed in westernmost Amazonia. The average annual temperature is 26 °C and can range from 12 to 38 °C. This ecoregion receives the highest annual rainfall in the Amazon, with up to 4,000 mm in the west and 2,500-3,000 mm in the east. [...]