The optimal habitat of P. terribilis is the rainforest with high rain rates ( 5 m. or more ) , altitude between 100-200 m , temperature of 26 Â C , and relative humidity of 80-90 % . The optimal habitat of P. terribilis is the rainforest with high rain rates ( 5 m or more ) , altitude between 100 â `` 200 m , temperature of at least 26 Â C , and relative humidity of 80 â `` 90 % .