Someone posted an intriguing observation in the SQ25 thread: in the business class cabin on the A380, the temperature tends to be cooler towards to back of the plane. I'm someone who prefers cool air on planes, so this is very useful information, assuming it's generally correct.

But that got me wondering if a similar temperature gradient occurs on other planes. In particular, the itinerary I've booked includes A350 and A350ULR. Where should I sit for the coolest air (in the J cabin)?