The first type of climate is developed between the Cordillera Pre - Andean Middle surrounding the Depression. Not to be characterized by a dry season rainfall occurring throughout the year, presenting however some features of a break during the warm season rainfall. In this temperate rainforest does not have large temperature swings. This is facilitated by the liquid surface of Lake Ranco, moreover, prevents frost on its banks. During the spring and summer there is a persistent cloudiness that tends to dissipate by noon, which is known as South negro.3