Upvote:4
For upper body, you’ll need a windproof, breakable jacket and a medium jacket full of down or synthetic fill.
For lower body, you'll need a pair of gore-tex windproof, waterproof and breathable trousers. Some medium weight polar fleece trousers, some medium weight thermal leggings, a pair of walking trousers (not cotton), some nylon shorts (not cotton) quick-drying and finally, some lightweight long-johns.
And don't forget to protect your head and feet as well with a lightweight warm hat and plastic boots.
Safe hiking! :)