How old is this article? It seems to use the old Fahrenheit temperature scale. I'm sure my grandfather would understand those temperatures but for myself I had to convert each one into modern units. Eventually I couldn't be bothered and stopped reading.
Frankly I'd rather use a system where 0 degrees is "fucking cold" and 100 degrees is "fucking hot", but neither fatally so, with 100 different steps in between.
Meh, I've stopped trying to ever argue stuff like this. There is simply a large class of people who will never believe in l10n if it involves en_US, only if it's any other country or region in the world.
tl;dr: the US has a long and tragic history of half-hearted attempts to switch to metric, beginning in the mid-1800s (when metric was made an international standard, with the active participation of the US... one of the original seventeen signatory nations to the Metre Convention), and continuing on through today, where the US is one of three remaining countries (with Myanmar and Liberia) that has not adopted the International System of Units (SI) metric system as their official system of weights and measures.
Along the way we get sad stories like the loss of the Mars Climate Orbiter in 1998, where everyone except Lockheed Martin was using metric units in the parts and software written for the orbiter.