More can be written on this. (Minor edits for punctuation &c.)

For clothing, there is a FAQ section, "Clothing and climate" with three applicable answers by /u/cecikierk, /u/redsalesperson, and /u/colevintage.

Although having a lot of FAQ Finders links in one post is not as good, you'd like to know about other heat adaptations, some for clothing, some not.

'How did laborers in the American South "beat the heat" before the invention of air conditioning?' by Georgy_K_Zhukov on architecture, day schedules, and activities.

"I am a French noble in the 1700s and it's ever so hot today. I shall require cooling and refreshments. What is at my disposal?" by sunagainstgold on French architecture and travel.

"Westerns usually show people wearing long underwear and heavy clothes (long sleeved shirts, vests, jackets), even in the sun. Is this accurate? Wouldn't they be hot?" by merryprankster2 on clothing etiquette.

"Approximately how long would it take a middle-class woman to get ready (from waking to stepping out in public) in 1750? How long would it take a middle-class man?" by colevintage on underclothing.

This is not to discourage discussion (indeed, one consolidated set of posts to put into the FAQ would be great). More questions, data, and debate are welcome.