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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.
Nov 15, 2013, 10:24 PM. Go for it, I was in Peru in February and the weather was better than expected. It was a bit rainy in Cusco, but there were sunny spells, too. Do not pay much attention to the weather forecast for Machu Picchu; the weather is rather hard to predict there. When I was there, it was supposed to be rainy, but I got a lot of sun on the top of Wayna Picchu.