A magnetic Christmas light assembly for hanging Christmas lights on a metal roof includes a conductor that may be electrically coupled to a power source. A plurality of light emitters is provided and each of the light emitters is electrically coupled to the conductor. A plurality of retainers is provided and each of the retainers is coupled to the conductor. Each of the retainers magnetically engages a support surface thereby facilitating the conductor to be removably retained on the support surface.