1 Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.  A chemical substance is composed of one type of atom or molecule.
February (Inca Trail Closed) 1  Overview: Another wet month, and not the best time to visit to Machu Picchu. 2  Temperature: Daytime average highs are around 20 degree C (68F) and night time average lows around 8C (46F) 3  Humidity: Average daily relative humidity is around 66 %.
Rains and humidity. From November to March is the rainy season in Machu Picchu, while between April to November is the dry shiny season. The rain months take approximately the 80% of the annual volume of rains (1.600 â 2.300 mm). The annual average of humidity is 77% in the dry season and in the wet season is 91%.