Why are you limited to Maine, NY and Penn? There is still time to apply to colleges in more southern states it needed isn’t there?
If your doc tells you your medical condition would worsen in a cold climate could that be a reason to get out of an ED decision? That might be worth looking into.
As for the cold, unless your doc tells you the cold would be bad for you, I think you’d been fine in Maine. You just might need a serious adjustment in your wardrobe. I’m sure some students would help you shop once you get there.
My D has the opposite situation. She is from the northern midwest and is going to school quite far south where it is very warm and humid at times. The first month was hard but she adjusted quickly. In fact she was talking to us on the phone the other day and was commenting she was wearing a sweatshirt and sitting in the shade and when the wind would blow she was cold. I looked up the temp where she is on my phone and it was 80 degrees! It’s going to be funny to see her try to readjust come winter break at home. We have snow here!