Walanae River is a river in South Sulawesi on the island of Sulawesi, Indonesia, about 1500km northeast of the capital Jakarta. The river flows in the southwest area of Sulawesi with a predominantly tropical monsoon climate. The annual average temperature in the area is 23°C. The warmest month is October when the average temperature is around …Walanae River is a river in South Sulawesi on the island of Sulawesi, Indonesia, about 1500km northeast of the capital Jakarta. The river flows in the southwest area of Sulawesi with a predominantly tropical monsoon climate. The annual average temperature in the area is 23°C. The warmest month is October when the average temperature is around 25°C, and the coldest is July, at 21°C. The average annual rainfall is 2550mm. The wettest month is January, with an average of 404mm of rainfall, and the driest is September, with 29mm of rainfall.