'Sultry' in the Bible

You whose garments are hot,When He quiets the earth [in sultry summer] with the [oppressive] south wind?

And it came to pass, when the sun arose, that God prepared a sultry east wind; and the sun beat upon the head of Jonah, so that he fainted; and he requested for himself that he might die, and said, It is better for me to die than to live.