I'm impressed that you started with climate zones, that sort of ground-work can really help your world take shape. I'm not an expert, but I'd guess climate changes up and over your mountains would be very dependent on how high (and how old) the mountains are. Based on what you've provided they look tall and craggy. Did you hand-draw all the mountains? This is looking good, I'm hoping to see more soon.

cheers,
Meshon