Mendoza (418 m asl)
Mendoza is the lowest place at this page with 418 meters. Compare the temperature of Mendoza with the other locations of these route. Mendoza should have the highest temperature. If not, check the precipitation and the cloudiness.
Uspallata (1.933 m asl)
Uspallata ist with it`s 1933 meters over the Ground much higher than Mendoza.
Look at the temperature, it is less like the temperature in Mendoza (Also here: if not, check the precipitation and the cloudiness).
Polvaredas (2.268 m asl)
Polvaredas has nearly the same hight than Uspallata, therefore the difference in temperature is small but you can see it.
Punta de Vacas (2.374 m asl)
Punto de Vacas hast almost the same height than Polvaredas. Therefore the similar average temperature.
Aconcagua (6.962 m asl)
The highest point of these mountain is at 6692 meters. The Vorecast is done for the highest point. This point is 4000 meter higher than Punte de Vacas. Here it must be very cold.
Eva Peron (3.300 m asl)
Eva Peron is 1000 meter higher than Punta de Vacas - compared with Punto de Vacas it should be colder. But Eva Peron is under the highest point of the mountain Aconcagua and deductive it is warmer in Eva Peron than on the peak.
Los Andes (809 m asl)
Los Andes has again a lower height. Look at the temperature, here, it is again much warmer.