I thought my post may stimulate this response - sounds crazy doesn't it?
I drove a (shhhh!) Suzi 413 to Mongolia in 2007 via the 'Stans, and the weather was really hot. No aircon, and waiting at the border to get into Uzbekistan the inside gauge showed 57.4 degrees C! Melting hot! Generally though, the temperature was about 38 - 40, and we noticed how we became acclimatised fairly quickly. So, rather than suffer thermal shock each time we step out of an artificially cooled interior, and never getting used to it, we decided to shed the weight of the AC in favour of a fridge to cool the beers.
Can't argue with that logic surely?
R