I would think any temperature under our natural body temp would feel cold. To take it further, I live in the north, so 75 can start feeling hot to me, yet people in the south might consider that chilly. We both have the same body temp so how does that work?
In: Biology
Because our bodies constantly generate heat and thus needs to also rid itself of heat.
We feel neither cold nor hot when there’s an approximate balance between the amount of heat lost and the amount generated. The body can adjust this, by restricting or increasing surface blood flow, by incressing or decreasing metabolic rates and by sweating.
To get rid of excess heat, 37C is a bit much, even if it is dry. Your body has to sweat a decent amount to maintain its temperature. Eventually the body finds a balance and you feel neither hot or cold.
If you then quickly move to say, 25C, your body will be off balance and lose heat faster than previously, and you will feel cold.
Or if you were in 19C and got used to it, and moved to 25C, you would most likely feel hot until the body again compensates by increasing surface blood circulation and sweating.
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