AC was not too common back then...at least not in homes. When we moved back to PA in the 80's we still did not have AC in a house that is worth 300K on Zillow right now (Ac since added, just not a slum). Our bodies were used to it. Sleeping was the toughest thing. I have friends from Brazil that keep their house "below 90" re: rarely turn on their AC, and they say they get chilly at night sometimes.