The river flows in the southern area of
Sumatra which has a predominantly
tropical rainforest climate (designated as
Af in the
Köppen–Geiger climate classification). The annual average temperature in the area is 24 °C. The warmest month is October, with the average temperature of 26 °C, and the coldest is January, at 22 °C. The average annual rainfall is 2,902 mm. The wettest month is November, with an average of 435 mm rainfall, and the driest is August, with 83 mm rainfall. ==See also==