Argentina

Argentina stretches from the subtropics to subantarctic Tierra del Fuego, reversing seasons compared to the Northern Hemisphere. Buenos Aires averages 10°C in July (winter) and 25°C in January (summer), with humid summers and mild, occasionally chilly winters. Patagonia (Bariloche, El Calafate, Ushuaia) has short, cool summers (December to February) with highs of 15-20°C and long, cold winters with snow from June to September. Mendoza wine country is sunny year-round with hot summers (30°C) and crisp winters (8°C), with harvest season in March and April. Iguazu Falls is subtropical: hot and humid year-round at 20-32°C, with the highest water flow from December to February. The best time for Patagonia trekking is November to March; Buenos Aires is pleasant from September to December and March to May.