On the other hand, more statistical-mechanics-oriented works have provided much knowledge on small, isolated systems. We know, for instance, that the microcanonical temperature can be defined independently of the probe, the type of fluctuation we may expect, including the dependence on different entropy definitions, and how to count microstates of finite coupled systems. Nevertheless, these works usually do not allow for a practical estimate of the temperature in applied cases of interest. This paper aims to bridge this gap between theory and applications by deriving a microcanonical temperature for an isolated molecule that can be routinely used in diverse applied fields, has an extended validity domain, and is based on solid statistical mechanics grounds.