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The Dry Season (April â September) From mid-April through until the end of September is considered the dry season at Machu Picchu. Days are bright and sunny with daily average temperatures of 18 Â°C (64 Â°F), after sunset (around 6.15pm) temperatures drop down to around 10 â 12 Â°C (50 â 54 Â°F) and evenings are cooler.
If you are not too bothered about crowded trails, busy hotels and the tourist hordes that visit Machu Picchu by train from Cusco each day then the best time to hike Machu Picchu is during the dry and peak season which runs from May through to September.