Clothes for rainy season

Cant speak for Peru, but I bought into what everyone said about Bolivia and came equipped with heavy duty rain gear and sub-zero clothing. Except for the rain shells, I haven't used any of it. It's only super cold in the Bolivian winter (April to August). I'm still here now, and the rainy season is gradually coming into full swing now.

It will still be summer (or fall actually) if you're coming here in February, so don't do like I did and lug around thermal pants, jacket, etc. Bring some layered clothing and quality breathable rain shells (you'll be glad you did - your Columbians are probably waterproof/windproof/breathable, but you might want similar shell pants too - my Marmot Precips held up real well, even though they don't feel super durable), and bring some lightweight clothes, as it can get mighty hot during the day hours. Something that ideally you can wash in the sink and have dry by morning, and is tough and super breathable is fabulous.

I also brought a fleece sweater and vest, and treated them with NikWax or Garsen (or something like that) to make them stay breathable and waterproof, but I have only worn one of them so far. If you're walking around at 3 or 4 am in the altiplano, especially where its very flat, it will get cold and somewhat windy, so throw a fleece under your rain shell and you'll be fine. Its not that cold here, and will be warmer when you get here.

As far as thermal tops and bottoms (and underwear and socks) - currently its just taking up space. Never used it, although if you take the cheap night bus or trains across the altiplano, it would be nice to wear a fleece and warm top and thermal pants, and maybe even thermal socks. Or, spend the money on the nicer buses, as they have heating and won't be broken down as long.

The waterproof breathable shoes are an absolute must. Hopefully, yours are higher around the ankles. I kind of regretted that with mine a few times now. If you'll be in super low altitudes, spray your shoes/boots with permethrin before you go - no bug will crawl up them for months, and in lower altitudes, the Chagas disease is more common, as are other pretty bad tick and lice-born things. Its worked awesomely for me - just watch the buggers get close and ZWAP - instant paralysis. Note that Permethrin has no smell, and its basically a nerve gas, so don't be cavalier when applying it! Your future kids might end up with 3 heads and tails.

Mind you, if someone's reading this months from now and planning to go in the Bolivian winter, none of what I said applies. Everyone tells me its nasty cold then. And I haven't a clue about Peru's weather, but hopefully this'll help just a bit.