I've got a big backpacking trip with a Boy Scout crew that I'm leading in the summer. This will be in New Mexico where it will be in the 30s-40s in the morning and over 100 in the afternoon. There will be sun beating down, and also drenching thunderstorms.
They helpfully provide a packing list specific to their program. Broken down by personal gear and group gear. As a single person, you would have to carry everything yourself, so it would all be personal gear.
http://www.philmontscoutranch.org/Tr...attoBring.aspx