The river flows in the southeast area of Sulawesi with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 22 °C. The warmest month is October, when the average temperature is around 24 °C, and the coldest is July, at 20 °C.[4] The average annual rainfall is 2495 mm. The wettest month is July, with an average of 337 mm rainfall, and the driest is September, with 28 mm rainfall.[5]
