I´m from Chile. July and August are the two center months and the best ones. Usually last week of july and first week of august are the school holidays so it can get a bit crowded but not on week days and only on the three resorts closer to Santiago (Parva, Valle Nevado and Colorado). Best snow July and August too.
This year season ran from June 15 to Sept 25. For you to make an idea.
See ya next year !!!!!
u ment Santa Tere ????