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C predictions tend to be exact numbers. F predictions are typically "50, low 50s, mid 50s, high 50s" (four per decade).

10 C degrees are 18 F degrees. So in this interval, C has ten points and F has 7.2 points.

So maybe F better suits the accuracy of predictions (i.e. significant digits -type stuff).



Viewed from a non-American perspective, you're just rounding when talking about temperatures Fahrenheit because the numbers are uncomfortably large to be used directly.

In the rest of the world, the weather forecast is "21 C", not "low 20s".


But setting your thermostat to 67 degrees vs. 70 degrees is a noticeable difference, which is where F becomes a better measure.


As is setting your thermostat to 19C vs 21C which is what those convert to rounded to the nearest degree celcius.




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