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 %.
November and March are risky months for trekking (not for visiting Machu Picchu by train) but it is still possible to encounter limited rain. The upside of these months is that you will have the trail largely to yourself. In this article we provide useful historical weather charts on temperature, rainfall and wind.