Job 37:9 - Matthew Poole's English Annotations on the Holy Bible

Out of the south, Heb. out of the inner chamber; as the southern part of the world is called, because in a great part it was and is hid and unknown to those who live in the northern hemisphere, in which Job's habitation lay. Or, out of the chambers of the south, as it is more largely expressed, Job 9:9; for this is opposed to the north in the following clause. The whirlwind; violent and stormy winds which in those parts most frequently came-out of the south, whence they are called whirlwinds of the south, Malachi 9:14. So also Isaiah 21:1. Cold, i.e. cold and freezing winds, which generally come from that quarter.