Weather is probably a major factor when you plan your trip to Humahuaca, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and December with an average temp of 72°F, while the coldest months are July and June with an average of 57°F. The rainiest months in Humahuaca are February, January, December, and March, with each month seeing an average of 10 inches of rainfall.