Abstract: A window well cover for a below-grade or basement window is disclosed. A transparent upper structure or portion is designed to cover a below-grade window on an outside of a building or other structure. The upper end of the transparent upper structure extends, or is angled, downwardly from a mounting flange terminating at a lower end. Furthermore, the transparent upper structure has two curved sides, which serve to connect the side ends. Mounting flanges extend outwardly from the two side ends. The window well cover includes a vent portion integrally formed therewith of an air pervious material to allow continuous air exchange through the window well cover. The vented portion may extend the length of, or the entire lower periphery of, the transparent upper structure. The window well cover, which is free of movable parts, allows for continuous airflow through the window well cover while restricting the entry of debris and insects.