weathered

Worn, stained, or warped by or as if by exposure to weather; seasoned.

Sloped to shed water.

Discolored or disintegrated by the action of the elements: said sometimes of surfaces of wood, but oftener of Stones or rocks.

Seasoned by exposure to the air or the weather.

In architecture, having a slope or inclination to prevent the lodgment of water: noting surfaces approximately or theoretically horizontal, as those of window-sills, the tops of cornices, and the upper surface of flat stone-work.