A unit for measuring temperature that goes from zero to one hundred is known as Celsius. Water freezes at zero degrees Celsius.
In the U.S., it's standard to use Fahrenheit to measure temperature, while Celsius is the preferred scale in most of the rest of the world. If 34 degrees feels quite chilly to you, you're thinking in Fahrenheit; 34 degrees Celsius is the temperature of a summer day in the desert! Celsius, originally known as centigrade, was named after the Swedish astronomer who invented the Celsius scale in 1742.