Hi Everyone! im new to this blog!, anyway im planning my first trip alone to South America trough june to August visting Peru/breif chile trip and Argentina! i had a couple of questions on my mind! i understand im going to South America during winter but how cold or nasty or nice is the weather in the 3 countries im going to? also how easy is it to travel around by bus through the countries Peru/chile/argentina? and any good party Hostels i should stay at along the way?
The weather depends on the altitude and the latitude, basically the higher and / or further south you are the colder it is (it can be very cold in the Andes, we had -15c at night at 4500m).
On the beaten track bus travel is pretty easy and straightforward. Argentina has probably the best buses and services, but Chile and Peru are OK as well.
The temperatures and wether will vary according to which part of each country you are in. In Santiago there will be skiing near the city but warm weather in the north, especially inland. The south will be wet and cold. Argentina will also have he best weather in the north. For Perú it is the best time to visit the highlands; Cusco/Machu Picchu. Lima will be grey and drizzly. The north will be warm.
There are a variety of bus services according to price/destination in all three countries. Probably best in Chile and Argentina, but there are some tourist oriented bus services in Perú which are very good. Sometimes the geography of Perú means smaller buses are used and night buses are not recommended on some routes.
My experience of the buses in Argentina and Chile are very good. Choose "Coche Cama" on one of the big companies for a little more cost, and you will enjoy very comfortable seats and service with food and beverages.