Normal human body temperature is typically stated as an average of 36.5° C.
When human body temperature and atmospheric temperature are the same, our body feels at one with the surrounding environment, the sense of separation decreases and consequently the ego suffers a crisis.
The ego is here understood as our split identity, the belief of being an autonomous unity living in a separate reality. Cold and temperatures below 33° C are ideal for the ego because they allow the body and the related ego identification to live in thermal separation from the surrounding environment.
So if you are on a spiritual path and intend to move beyond your ego identification, when the temperature is around 36° C, let the ego complain and enjoy an ecstatic time of sacred union with the whole.