Additional modifiers for extreme cold?

[RyanW]

Originally Posted by Anders

*obligatory metric-system-is-better screed*

In temperature, there's little need to convert anything, so it doesn't have any benefit from power of 10 conversion. The difference is pretty much entirely familiarity. You could even make a case that Fahrenheit is better suited to environmental temperatures, where less than 0 or more than 100 are dangerous extremes.