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 %.
Machu Picchu Weather. May through October: The winter in the Southern Hemisphere is also the dry season, which means it's usually the best time to visit Machu Picchu. Temperatures are quite comfortable, with the highs in the 80s and lows in the high 40s, though the temperature can drop to freezing in some cases.