Dr Ramesh Manocha comments on the historic association of meditation and a sensation of coolnesss:

Interestingly, an association between meditation and the subjective sensation of coolness can be found in some traditional Eastern texts. For example, in the Sikh text Guru Granth Sahib the importance and effects of meditation are described frequently and there are a number of instances in which mental tranquillity, even transcendent experience is associated with a sense of coolness.