A timer assembly housing is configured to include a number of features, including but not limited to a tortuous sealing lip, adjustable hinge assembly, removable backing plate, removable pin hinge, toggle switch, and a wiring lid. The timer assembly includes a weatherproof housing having a base with a series of sidewalls and a rear wall, the base sidewalls extending forward from the rear wall to an open front, a lid having a series of sidewalls and a front wall, the lid sidewalls extending forward from the front wall, and a timer assembly positioned within the base. The lid is selectively pivotably secured to the base along one of the base sidewalls.