This is the historical record of the average ambient temperature calculated for a specific past sampling window, letting an admin retroactively review how the ambient trend looked at that point in time. It is useful for correlating a past incident, like a reported chassis alarm, with what the temperature trend actually looked like around that time. For example, pulling the ambientTempAvg history around the timestamp of a past thermal fault would confirm whether temperature was already trending upward before the fault triggered, or spiked suddenly.