Who uses degrees Celsius?

Answer 1

The entire world, except for the United States and some of their territories, uses Celsius - although most American scientists, engineers, doctors, meteorologists use Celsius.(and other metric units) to allow other world scientists to more easily read and use their work.

Answer 2

Degrees Celsius is commonly used by scientists, meteorologists, and people in countries that use the metric system to measure temperature. It is also the standard unit of temperature measurement in most countries outside of the United States.