| Rokan-kiri River | |
| Name Other: | Sungai Rokan Kiri, Soengai Ro Kon-Kiri |
| Pushpin Map: | Indonesia Sumatra#Indonesia |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of river mouth |
| Source1 Location: | Sumatra |
| Subdivision Type1: | Country |
Rokan-kiri River is a river in Riau province, central part of Sumatra island, 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 August, when the average temperature is around 24 °C, and the coldest is January, at 22 °C.[4] The average annual rainfall is 2742 mm. The wettest month is November, with an average of 401 mm of rainfall, and June is the driest, with 85 mm of rain.[5]