FIG. 1 is a perspective view of a vertical-mounted, weatherproof, while-in-use, electrical receptacle cover assembly showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a perspective view similar to that of FIG. 1, wherein the receptacle box shown in phantom is for illustrative purposes only and forms no part of the claimed design.