Board Thread:Off Topic/@comment-24993958-20160711184711/@comment-28288412-20160711191606

They are refering to core body temperature. I'll personally have to use celsius when describing it as that is the temperature measurement method over here.

The normal core body temperature is 37 degrees celsius. Differing too much from this average can have drastic and incredibly harmful effects on the body, an example being hypothermia which I believe starts to occur once your temperature falls below 35 degrees celsius.