| Kumu River | |
| Name Other: | Sungai Kumu |
| Pushpin Map: | Indonesia Sumatra#Indonesia |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of river mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Indonesia |
| Subdivision Type2: | Province |
| Source1: | Bukit Barisan |
| River System: | Rokan basin |
Kumu River is a river in Riau province, central-eastern Sumatra, Indonesia, about 1,100 km northwest of the capital Jakarta.[1] [2] It is a tributary of the Rokan River.
The river flows in the central area of Sumatra which has a predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 23 °C. The warmest month is March, when the average temperature is around 24 °C, and the coldest is January, at 22 °C.[4] The average annual rainfall is 3766 mm. The wettest month is November, with an average of 336 mm rainfall, and the driest is July, with 113 mm rainfall.[5]