Also, your cabin is air conditioned. There is a dial near the bathroom wall (I think that's correct for the location).I, who are almost never cold, find the ship temps normal and confortable. I have been amazed when stepping out on our balcony between islands (ports) that sometimes the air is SO humid! I don't know why that surprised me, but it did. I would venture to guess that, for you coolest port, Port Canaveral would be #1-the rest, remember are in the Caribbean.
Mariner is, and has been, our favorite Voyager class ship, and we will miss her when she moves to the left coast next year.