> > Maybe you can go to Madeira and give some perspective to the misguided people there who wear buttoned-up winter coats in the 18 C (64 F) "winter".
>
> 18 °C is "winter" these days?

"Winter" was in quotation marks to indicate that this is the kind of absurdly warm temperature that people from tropical climates would consider to be winter.

The thing is, if you're used to a hundred degrees all the time, your blood gets thin, and a drop to 18 C / 64 F truly *is* going to feel cold and perhaps necessitate heavy clothing. If that same person moved to Canada or Finland for about a year, maybe two, he'd become as acclimatized as the locals. Contrarily, if a Canadian or Finland spent a year on the equator, you'd be bundling up at 18 C / 64 F too.