What will the temperature be in Huaraz and in the mountains?
In Huaraz during the day, it can be hot at times up to 25 degrees Celsius in the middle of the day, but at night it is much cooler, around 5 degrees Celsius. On trek, temperatures vary a lot. It can be as warm as 18 degrees C to 20 degrees C during the day out of the wind, or as low 8 degrees C if the weather is not good. Often it is warm enough to walk with a light tee shirt ands shorts, but there is always a cool breeze coming from the mountains, so when you stop for a break, it is important to have warm clothes to put on. When the sun goes down, temperatures drop very quickly. It will be zero degrees C or lower at night, and you can expect to wake up in the morning to heavy frosts. In high camps on climbing trips, you can expect temperature to fall as low as minus 10 degrees C at night in some camps or even lower if there is bad weather.
