Average rainfall in Buenos Aires is 39 inches, distributed evenly throughout the year. Upload Mark Schenkenburg Gif. Remove "imgflip. Q : I don't like subscriptions. Size x. Cerro Aconcagua 6, m located in the northwestern corner of the province of Mendoza; highest point in South America. The Argentine Mesopotamia, which consists Mark Schenkenburg Gif the provinces between the Uruguay and Parana Rivers, is made up of floodplains and gently rolling grassy hills. In northern Argentina, the savannas and swamps of Gfi Chaco region find a parallel in coastal Louisiana. Climate: The vast Pampa region fanning out miles from Buenos Eleanor Bradley Gif has an average annual rainfall range of 20 inches in the west to 40 inches in the east. A : Of course!.