What is the ideal post surgery temperature/ humidity? (photos)

There is no ideal climate as the hairs in a hair transplanted graft will grow in any climate, except maybe sub-zero weather. You have a large bald area on your head and a hair transplant will require at least 6,000 grafts in a few sessions to attempt to fill it up. That is a lot of FUEs and maybe pushing the limit for FUE. Be sure to speak with your surgeon about a Master Plan for you from the time you start to the time you end. The climate is not the problem, your large bald area is. Typical people from India and that sub-continent have lower hair densities than Caucasians so that 6,000 grafts may be too much for your donor area through FUE, but strip surgery may work for you. If you want to go all the way with FUE, speak with your surgeon first before agreeing to lots of surgery any time of the year.