The Second Great Awakening affected the temperance movement in two ways.

First, the Second Great Awakening increased the degree of religious fervor in the society.  This made people more likely to have moral misgivings about alcohol and to work against it.

Second, the Second Great Awakening made people more likely to believe that they could and should make American society more perfect.  The Awakening led people to believe that God wanted them to go out and make their world a better place.  One of the ways to do this was by promoting reforms such as temperance.