High water occurs during the warm periods of the year.
Runoff in the spring totals 32 percent; in the summer, 52 percent; and in the fall, approximately 16 percent.
Comprising half the Far Eastern Federal District, it is the largest subnational governing body by area in the world at 3,083,523 square kilometers (1,190,555 sq mi). It is also known for its extreme and severe climate, with the lowest temperatures in the Northern Hemisphere being recorded in Verkhoyansk and Oymyakon, and regular winter averages commonly being below −35 °C (−31 °F) in Yakutsk.
The hypercontinental tendencies also result in very warm summers for much of the republic.
After Nunavut was separated from Canada's Northwest Territories, Sakha became the largest subnational entity (statoid) in the world, with an area of 3,083,523 square kilometers (1,190,555 sq mi),).
Taiga forests cover about 47% of Sakha and almost 90% of the cover is larch.
The Sakha Republic is the site of Pleistocene Park, a project directed at recreating Pleistocene tundra grasslands by stimulating the growth of grass with the introduction of animals which thrived in the region during the late Pleistocene — early Holocene period.
Turning northward, it cuts through a number of mountain chains of the Cherskii Mountain Range. Intersecting the Chemalgin Mountain Range, the Indigirka flows through a deep canyon and forms rapids. This section is not even suitable for floating timber.
Here the width of the valley ranges from 0.5-1 to 20 km. In its upper course the Indigirka is joined by its main tributaries: the Kuidusun, Kiuente, and El’gi from the left and the Nera from the right.