I can remember playing hockey on an outdoor ice rink in Calgary, Alberta, Canada (some 35 years ago). I don't remember the exact temperature, but it was certainly well below 0 - Fahrenheit. A minute's shift on the ice and I was sweating buckets, 10 seconds on the bench waiting for the next line change and some of my sweat was already literally freezing.
THAT'S cold.
Colder than hoarfrost on a boar's whiskers. (or is it boarfrost on a hoar's whiskers? Hehe)
I get a kick out of the friolentos here who are dressed up in parkas and start covering their mouths with scarves when the temperatures drop below 18-20 degrees. Heating here kills me - my apartment has no controls for the building central heating and often causes me to sweat so much I have to open a window to cool things down. Walking down the street in a light jacket and I step into a clothing store to look at something and I'm suddenly so hot I'm getting dizzy thanks to the heaters going full...
And I'm from Houston. Hotter than Buenos Aires in the summer time, with similar humidity, and colder in the winters (at least at the annual extremes - I've been through many ice storms in Houston, but only once did I see snow here and as I understand that was the first time in 89 years, here in the city itself).
Doesn't matter where I am, I sweat my ass off in the summers and feel relatively comfortable in moderately cool climates in which I have found myself since Calgary. Buenos Aires is certainly more moderate in climate, for me.