Abstract: A retractable awning assembly includes a roller, a flexible canopy having an inner edge secured to a wall and an outer edge secured to the roller, and a pair of arm assemblies operable to move the roller between a retracted position adjacent the wall and an extended position spaced from the wall. Each arm assembly includes a support arm of fixed length and a rafter arm of variable length. The support arm includes a tube and a bracket rigidly secured at an intermediate position along the tube. The rafter arm includes telescoping inner and outer tubes and an inward facing button lock for automatically locking the tubes in extended relation. The support arm has an upper end operably connected to the roller and a lower end pivotally secured to the wall. The rafter arm has an outer end pivotally connected to the support arm bracket and an inner end pivotally secured to the wall.