A weatherproof cover is provided to shield an electrical structure, such as an electrical outlet or plug, electrical switch, meter, or the like. The weatherproof cover is used to shield the electrical structure from moisture, dust, and wind. The weatherproof cover is a relatively inexpensive, easy-to-fabricate, and effective one-piece weatherproof cover which is attachable to an existing wall or other flat surface, and which is easily mountable thereon. The weatherproof cover is openable and closable to permit ready servicing or use of the electrical switch or outlet structure being covered. A spring is used to resiliently bias a top portion of the weatherproof cover to a bottom portion of the weatherproof cover. In use, bolts or screws can be inserted through openings in the bottom portion of the weatherproof cover into a wall or other surface. The bottom portion of the weatherproof cover has an aperture therethrough, which exposes the electrical structure being covered, so that when the top portion of the weatherproof cover is in an open position, the electrical structure can be used.