The cause of Siberia’s extreme climate is .

Here is an explanation

Explanation:

The low temperatures of eastern Siberia are caused by the Siberian high pressure system. The Siberian high pressure system, also known as the Siberian high, is an accumulation of cold dry air that accumulates in north east asia that begins to build up at the end of August, peaks in winter, and usually weakens in April.

answergeosphere;