A gutter cover (20) is designed for use with a longitudinally extended gutter system (10). The gutter system (10) comprises a gutter (11), a back wall, and a ledge (13). The ledge (13) is at the front of the gutter (11) and comprises a lip (14) on the side of the ledge (13) that faces the back wall. The gutter cover (20) is fashioned to extend longitudinally, overlying the gutter (11). The gutter cover (20) comprises a top (21), a vertical wall (22), and a clip (23). The vertical wall (22) extends downwardly from the rear of the top (24), and is fashioned to fit into the back wall. The top (21) comprises apertures (26), which are sufficient to allow passage of draining rainwater into the gutter (11). The clip (23) is at the front end of the gutter cover (11), and fashioned to receive the lip (14).