Fahrenheit is demonstrably better for describing temperature as experienced by a human.

I used to say this exact thing. I decided to be scientific about it and test it by learning Celsius and trying it for a few months.

I have not gone back. It has been seven years. All my devices are still reporting Celsius to me.

I was enjoying the process just because of the novelty of learning a new temperature scale, but when I experienced my first winter with Celsius I knew I’d never go back.

0 being freezing is so much more useful than you’d think. 23°F doesn’t really mean anything to me, but -5°C means “as far below freezing as 5°C is above freezing.” It inherently provides context without having to do math.

Also, the degrees being “larger” makes them more meaningful and thus easier to learn.

If you want to try what I did, here are some useful steps. First, this rhyme: “30 is hot, 20 is nice, 10 is chilly, 0 is ice.”

More importantly, here’s the heuristic I came up with: memorize the 10s. So 10°C = 50°F, 20°C = 68°F, 30°C = 86°F (easy to remember 68 and 86 because they’re reversed). Then memorize the 5s. You can always find them because they’re 9°F off from the 10s. 25°C = 77°F for example.

Once you have those points memorized, you can go up and down from them using 2°F per 1°C. It’s really 1.8, but since at most you’ll be 2°C away from a certain value, the most you’ll ever be off is 0.4°F. So if the weather app tells you it’s 22°C, you start at 68°F and add 4 to get to 72°F (it is actually 71.6 but who cares?). If it says 23°C, you start at 77°F and subtract 4 to get 73°F (actually 73.4, but again who cares?).

I used this heuristic until I didn’t really need it anymore. I still use it if someone asks me the temperature, because I live in the US and no one knows Celsius. So I quickly convert and give them their Fahrenheit value. But at this point I don’t really need to do so personally.

And like I said, I much prefer Celsius even for describing weather. It has really taught me how arbitrary both scales are. A co-worker of mine said, “Yeah but 100° sounds hot.” I replied, “The first time a colleague in India told me it was 40° outside, that sounded hot.” I didn’t need to convert it (didn’t bother memorizing that value because I never see it where I live), it just sounded hot because I knew the scale. (It’s 104°F for the record.)

But as I touched on, I was shocked by how much the freezing point being zero mattered. It makes sub-freezing temperature values so useful. I hadn’t expected that, growing up I knew 32°F was freezing and was so used to that nonsense that I didn’t realize what I was missing until I experienced it.