With so many different elements at work it can be tricky to nail down.
To simply summarise Argentina’s weather in a short paragraph is nigh on impossible. The eight largest country in the world, bordered by the tropics in the north, the Atlantic to the east, the Andes to the west and Antarctica to its south…to say that predicting the weather is not easy is an understatement! The main thing to bear in mind really is the mighty Andes range. This natural phenomenon acts as a rain barrier from the rainfall of the Pacific and so, on the whole, it is worth bearing in mind that much of the Argentine side of the Andes is dry.
Along with this, there are a few other phenomenon that are worth considering such as the tropical climate in the very north, that remains humid and relatively warm year round, and the very south, which becomes frozen in our summer time and so impassable.
Generally the temperatures and the climate in Argentina is such that it is best to visit in the winter months for the northern hemisphere. Temperatures in places such as Buenos Aires do get up to the mid 30s in the heat of the summer and so it is worth avoiding the cities for too long a period.
Other points worth noting are that the Patagonian winds change around the Spring and Autumn time which can make life a little more comfortable, and the best time of year for walking is when the temperatures are a little cooler in the Autumn or Spring as well. For far more information and depth then please follow the link below.