How cold is liquid nitrogen?
Under normal atmospheric pressure, nitrogen exists as a liquid between the temperatures of -210°C and -196°C which equals -346°F and -320.44°F. Below -210°C, nitrogen freezes and becomes a solid. Above -196°C, nitrogen boils and becomes a gas. Liquid nitrogen stored in unpressurized conatainers like the tanks sold here is slowly boiling away, so the temperature is -196°C or -320.44°F.
So how cold is liquid nitrogen? Very cold!
Since liquid nitrogen is obtained from the atmosphere, it is inexpensive and is rarely refrigerated. It is kept in insulated containers like the tanks sold here that are called Dewars.