We are heading for Peru third week of this month. We are looking forward to visit Lima, Cusco, Colca Canyon, Arequipa, Puno, MP...

I am wondering about what type of weather to expect to help us pack. More importantly, I wonder about the climb to MP as we arrive early morning when it is cool and will have to shed layers as we climb... and to have to lug these with us!!

I am saying to myself: long pants, long sleeves, sweater, windbreaker (which keeps one pretty warm and is light to take).

Any advice would be most appreciated.

Thanks!