I live in Austin, TX. It has been 105-ish every day this week, but the humidity is 30% during the hot part of the day. My office has a ceiling fan which is on low most of the time. Some people will not believe this, but I have the minisplit set at 80F and when the sun sets I turn off the fan because I start to get cold. When I leave my office (which is attached to the garage) and walk the 40 feet into my house through the 98F evening air I often feel: ah, that warmth feels good.

To summarize: it is one part adaptation to the heat, one part low humidity, and one part air circulation.