The hot, humid and rainy climate of the Yungas may induce lethargy, but it’s nevertheless more agreeable to most people than the chilly altiplano. Winter rains are gentle, and the heavy rains occur mainly between November and March. The average year-round temperature hovers in the vicinity of 18°C, but summer daytime temperatures in the above 30°C aren’t uncommon. As a result, the region provides a balmy retreat for chilled highlanders, and is a favorite R&R hangout for foreign travelers.
The mountains of the cordilleras are serious, lofty beasts and conditions can be extreme, with warm days and nights that drop well below zero.