During last year's hot season, we wondered whether knowing that the temperature had reached triple digits made it feel hotter. We spent many afternoons watching our outdoor thermometer from the relative cool of our dark little hut.
I'm getting another opportunity to research the topic this week. Yesterday I peeled myself out of the Cruiser after an hour-long drive that left my entire back side (shoulders to ankles) soaking wet. (Disgusting, but I do welcome the cooling evaporative effect.) A teacher at the school we were visiting mentioned that it was 39 degrees (C), which didn't seem too nasty until I did a quick calculation on my cell phone and realized that was more than 100 degrees F. People, that is hot.
What made it feel truly miserable was knowing I was heading back to a hotel room with an air-tight mosquito net and no fan. (Cue violin music.)