Cº is the final boss of the C family of programming languages, once you've sharpened your senses to an objective double plus level of holy, minus any rust, you can finally get the degree.
I mean, Americans know 0C is the freezing temperature of water and 100C is the boiling temperature of water, so even with that most basic information taught in like, First Grade Science, people can understand the meme.
People wearing shorts in the cold vs people wearing jackets in the heat.
When I lived in Minnesota the shorts came out when we warmed up to even 1C. Yeah I'm American but I've lived a couple of years in Europe and I can math so I know what a C is. I still prefer F. But my wife likes D.
Pfffffft of course I know what C is. It's the third letter of the English alphabet! CC is for needles and CCC is probably boobs or something. And Cs is what allows people go get degrees. (/J)
It's easy to convert though. (212-32)/100 = 1.8. So you multiply your temperature in C by 1.8, and then add 32, and you have your temperature in Fahrenheit. So if it's 30C out, (30*1.8) +32 = 86F.
It is, admittedly, easier to convert centimeters to inches; that conversion is exactly 2.54cm/in.
And for that matter both of those things happen in this same country. Should've seen the looks I'd get from southerners when I was operating a ski lift in a T-shirt.
Edit: celebrating the first snow by jumping in a lake has also gotten colorful reactions from outsiders.
I just wear shorts in whatever wether I haven't worn a pair of pants in almost 2 years if you exclude my uniform for a thing that I don't know to tell you
Fahrenheit makes more sense for gauging human comfort. Most people can sense the difference in 1°F. Celsius crams half the degrees between boiling and freezing into one scale.
A difference of 10°F is notable, 10°C is quite notable. 60's is cool, 80's is hot. Now do a 20° difference in C. 16 to 26 doesn't sound like a big difference.
Celsius works better for almost every other useful measurement. Go Kelvin if you must.