What's the level of humidity where you live?About an hour ago I took a thermometer from the kitchen drawer. It read 27.5 deg C. I went outside and stood in the shade - 38 deg C.
We do not have air con, but we do have cavity insulation and curtains with thermal linings which are kept closed during a heatwave. It works.
Edit to add, that's 82 deg F and 100 deg F
82F is pretty rough for indoor temp, even for those of us who are used to hot temps (and ways to deal with it)