The Weather during the trek to Salkantay change according 2 conditions the altitude and the season of the year, the 2 first days of the trek use to be cold and dry, because we are very high on the mountain, the third and fourth day use to be warm and humid because we down to the “Selva Alta” (high jungle) where there are more vegetation, plants, animals and insects.
The dry season is from May to November, during these months 90% of days are sunny.
The rainy season is from December to April, January and February rain a lot, around 18 days per month with thunders and lightning, March rain less maybe 10 days a month, and April less; some years could change a little this periodicity by the global weather changes.
Average temperature during Salkantay trek
Dry Season from May to November
Day temperature from 19°C to 25 °C
Night temperature from -°1C to -7°C
Rainy season from December to April
Day temperature from 17°C to 22°C
Night temperature from °4C to -6°C