How is the weather in the Peruvian mountains?
There is an extreme type of tropical highland climate. Annual precipitation occurs mostly between December and March. Temperatures are much reduced by altitude with only small differences from month to month. The daily range of temperatures is large, so the nights are quiet cold, particularly during the dry winter or low-sun period (Jun July) when frost is almost a nightly occurrence. In some parts of this region annual precipitation is as low as 250mm/10in. This is particularly so in the western mountains and valleys. Sunshine ranges from about six hours a day in the rainy season, when there usually are clouds in the afternoon, to as much as eight hours a day in the dry season. The suns rays are particularly powerful because of the thin atmosphere at this height, and sunburn can be a hazard. Temperature drops very rapidly after sunset or in the shade and the nights feel distinctly chilly. The greatest differences of weather and climate in this high mountain region are those experience
