Recently, I made a claim that there really isn´t much difference between the wet season and the dry season in Peru. I hereby revise my earlier statement.
I lived in Pisac for the wet season this year, and in the Sacred Valley, I truly don´t see much difference between the wet season and the dry season. There is some rain (and great rainbows!) , but not the constant downpours that everyone foretold to me.
But, do beware if visiting other parts of Peru during the wet months of November through April. This past week I´ve realized why. The roads in the back-country places outside of The Sacred Valley just are not safe during the wet season. Rock slides, mud and slick conditions make travel by car or bus very treacherous.
It´s officially the dry season here now, and with it, I can see a HUGE increase in travelers. We traveled for hours last week along bumpy, unpaved roads that twisted through 14,000´ plus mountain passes with mountain streams often pouring across the roads. One taxi driver pointed out to us where a bus his friend was driving lost control last month on the wet gravel road and fell into a gully.
I´ve had a good time living here during the slowest part of the year, getting to know the people and seeing lots of rainbows. But there is a reason why the dry season is more happening for travelers in this region – it´s safer for travel and sunnier for sightseeing. But still, don´t let the wet season deter you as it´s got high points as well.