Wemm, 66, a Sister of Mercy, said she sought permission from her order and from the Almighty to run for the office.
"He says, 'This is your decision. I'm with you and holding you in the palm of my hand,'" Wemm said.
If she wins, Wemm wouldn't be the first nun to serve in an Allegheny County municipality. Sister Mary Gregory Schessler of the Sisters of St. Francis is a Millvale council member.