I lived for a while in a country that uses the Celsius temperature scale. To convert to Fahrenheit, you would mentally double the C number, subtract ten percent of its value from it, then add thirty-two. The strange thing about this is that, on stepping outside, I’d have to go through all that just to see how to feel.
Either convert or just remember that 22° is perfect, 37° is normal body temp and therefore 98.6°F ... uncomfortably hot, and 0° is freezing, so anything minus is winter coat time. Easier to just learn think in terms of what the Celsius temps feel like. Trying to mentally convert to Farenheit reminds me of our American habit of switching hands after cutting food so we can use our fork in the right hand. Then switching back to use the knife again. Wasted motion and unnecessary metal on plates noise. Easily unlearned, and if you’re a traveler in places where you don’t wish to necessarily stand out as an American well worth unlearning.