Peru’s seasons are simpler to reason about than Thailand’s two-coast split or Greece’s ferry calendar \u2014 there’s a dry season and a wet season, and almost everything about when to go comes down to where you land between them. The one exception worth knowing before anything else: there’s a month the Inca Trail simply isn’t open at all, regardless of how good the weather looks.<\/p>\n
This is when the Andes actually deliver on the postcard version of Peru \u2014 stable skies, dry trails, and the clear mountain views that make Machu Picchu photos look the way they do. July and August are the peak of this window: the driest, coolest-at-night conditions, and also the busiest and most expensive stretch of the year, driven partly by Northern Hemisphere summer holidays.<\/p>\n
Both months sit just outside the July\u2013August crush while keeping nearly all of the dry season’s reliability \u2014 stable weather, Inca Trail permits still available (unlike peak months, which can sell out), and noticeably thinner crowds than the middle of the season. If you can pick freely, this is the strongest case on the calendar.<\/p>\n
April and October trade a bit of weather reliability for meaningfully thinner crowds and easier last-minute-feeling logistics \u2014 permits and train seats are less of a scramble, though an occasional rain shower is more likely than in the core dry-season months.<\/p>\n
The wet season brings daily rain, but rarely in a way that cancels a trip outright \u2014 mornings are often clear before afternoon showers build, and the landscape turns genuinely lush and green in a way the dry season never does. Prices drop and crowds thin considerably. January is the wet season’s roughest stretch specifically, with more sustained rainfall and cloud cover that can obscure Machu Picchu itself for entire mornings \u2014 worth knowing if you’re choosing a month within the wet season rather than avoiding it outright.<\/p>\n
This is the closest thing to a hard rule in Peru’s calendar: the classic Inca Trail closes entirely every February for maintenance, alternative trekking routes are at their worst condition, and rainfall is at its yearly maximum. Machu Picchu itself remains open via train, but if trekking is any part of the plan, February is the one month worth planning around rather than into.<\/p>\n