I still can't get the hang of Celsius after all the time I've lived in a country that (mostly) uses it. I have a rough idea of what's a nice day and obviously I know what freezing is and all that. But if the weather app says its 7°C outside, I don't know how to dress. So I still have mine in F (where it says 45 right now, which is about 7°C) and then I know what to do.

I just type the temperatures into Google. Like at my parents' house right now it's apparently -8. If I type "-8 F in C," the first thing that pops up is just the answer in big letters: -22C, apparently.