I like my room to be within the 26-28 degree C temp range (according to the aircon readout). If i recall right, i did come accross an article that claims differences in the speed of sound at various temperatures and altitudes above sea level. The extreme freezing climate and high altitude can make the speed less, right? But I think such conditions can hardly be conducive to survival, let alone listening. And if the room were any hotter than my preference, listening to music would be the last thing on my mind. In the frist place, I'd be wary of the survival of my amps in such a clime. And my physical comfort would come first before I start tuning my brain to accept sound waves. In other wods, the room conditions have to be comfortably right before I can indulge in this hobby.