As Argentina is south of the Equator, the seasons are the reverse of Europe. Buenos Aires is hot in summer (Nov – Apr) and mild in winter. The Lake District is beautiful in spring (Oct). Part of Patagonia’s charm is its unpredictability, and you should be prepared for four seasons in one day. The arid north western region can be very hot during the summer (Dec – Feb), while the Mendoza province is temperate year-round. The time of year to travel will depend largely on the areas that clients prefer to include in their holiday. High season is October – March.