An awning system for a canopy that couples to two legs of the canopy is disclosed. The awing includes a fabric cover and frameworks. The supportive frameworks include a pair of side supports, each attached to a leg of the canopy and a laterally telescoping crossbeam that attaches to the distal ends of the side supports. The frameworks further include a plurality of tent poles connected perpendicularly to the side supports. The poles support the fabric cover in an upwardly arched shape to facilitate the shedding of water. A tension pole is connected to the bottom of a proximal fabric panel and the top of the distal fabric panel using a system of fabric pockets. The fabric cover is removably attached to the frameworks. The awning provides all-weather protection and may display a sign. Removable rain gutters attach to the awning supports and channel water down legs of the canopy.