The lowest possible temperature, or absolute zero as it is called, is -459.67°F (-273.15°C).It is also called 0 kelvin, a scale with increments equivalent to degrees of Celsius, but which uses absolute zero rather than water's freezing point as its starting point. This is the point at which all atomic motion ceases.he lowest possible temperature, or absolute zero as it is called, is -459.67°F (-273.15°C).