What is the climate like in the middle latitudes of south america?

The middle latitudes (mid-latitudes, sometimes midlatitudes) are between 23°26'22" North and 66°33'39" North, and between 23°26'22" South and 66°33'39" South latitude, or, the Earth's temperate zones between the tropics and the Arctic and Antarctic polar regions. Weather fronts and extratropical cyclones are usually found in this area, as well as occasional tropical cyclones which have traveled from their areas of formation closer to the equator.

In the midwest because it has more moderate climate than the north or south west which makes farming far easier.