Per Mark Lloyd:
If you had been using C all your life, THAT degree size would be more
normal.

It's not a matter of "Normal"..... It's knowing how cold/hot I'm going
to be when the temp is N degrees C.... If decimal points were the
norm, no problem... but they are not and there's a much bigger diff
between 40 and 41 in Celsius than in Fahrenheit.
--
Pete Cresswell