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 %.
The best months to visit Machu Picchu are May to October. Generally in Machu Picchu it is hot during the day and cold at night. The tourist must be prepared, because the weather has fluctuations. The ideal thing is carry a backpack,a sweater of wool, a jacket. During the day the tourist can use a t-shirt and a comfortable pair of pants.