What layer of the atmosphere has the next coldest temperature after the troposphere?

The layer of the atmosphere with the next coldest temperature after the troposphere is the stratosphere. In the stratosphere, temperatures typically increase with altitude due to the absorption of ultraviolet radiation by the ozone layer. While the troposphere can reach temperatures as low as -60 degrees Celsius, the stratosphere can have temperatures that drop to around -50 degrees Celsius at its lower levels before warming up at higher altitudes.