[1][2][3] The river flows along the northern area of Sumba with predominantly tropical savanna climate (designated as As in the Köppen-Geiger climate classification).

[4] The annual average temperature in the area is 27 °C.

The warmest month is October, when the average temperature is around 32 °C, and the coldest is January, at 24 °C.

[5] The average annual rainfall is 966 mm.

The wettest month is December, with an average of 206 mm rainfall, and the driest is August, with 4 mm rainfall.