This INTEGER is the lowest temperature, in degrees Celsius, that the mid-module sensor recorded during the statistics-collection interval. Because the mid-zone sensor is often the first to show a gradual thermal drift caused by dust buildup inside the module, sometimes days before the front or rear zones move at all, an admin diagnosing a SIOC cooling problem checks this specific zone rather than relying only on the SIOC's single roll-up thermal status flag. A min sitting close to the average, such as 44, suggests stable conditions for this zone, whereas a min far below the average is worth cross-checking against the suspect flag for a possible sensor glitch.