Buenos Aires and La Estanzuela are located 35 miles apart across the water. Buenos Aires is a massive heat island, and La Estanzuela is a small town of a few thousand people.
Buenos Aires warmed tremendously from 1931 to 1995, the period of record for the La Estanzuela station.
La Estanzuela temperatures cooled during that same period, and the frequency of hot days plummeted.
The two-degree warming trend at Buenos Aires is bogus. The area is actually cooling. So how did NASA and NOAA deal with this? They reduced the two-degree warming trend to 1.5 degrees warming.
Data.GISS: GISS Surface Temperature Analysis
The surface temperature record is a farce. These people make no attempt to be even remotely credible.
Read more at Real Climate Science
South America is more Tropical and its almost always warmer in the Tropics that why many Birds and Monarch Butterflies go there in the winter