Paris didn’t have air-conditioning because they sit at a latitude of 49 where in the past you might have a week maybe two of sustained high temperatures above 90°, since Paris sits at a latitude of 49 which is north of the United States-Canadian border all the way from Vancouver to the lake of the woods Minnesota.

Which is hardly air-conditioning country above latitude 49 although obviously climate change may change that, but there was no point having air-conditioning that far north in the past for two weeks of possible hot weather, a resident living in the American southwest who will never have a white Christmas ever and air conditioning was always a must.