Your best friend is the “generic” poncho. The ideal thing is a large poncho that will fit over your day pack. You also need a rain coat. It is actually a good idea for your rain coat to be your outer shell (instead of a big winter coat). Then you can layer underneath it. We recommend this amount of rain gear even in the dry season, because it is so practical. An umbrella is optional. If you want to bring an umbrella, and you have room for it in your duffle bag, it could be helpful to bring one.