Why are we feeling hot when outside temperature is 36C? Isn't our body temperature 36C?

In normal health, our body maintains internal temperature
of about 37 degrees celsius, irespective of the temperature around us. Thus our feeling
hot or cold is not related to the temperature of the body, but to the amount of extra
heat we need to generate to keep the body warm in cold environment, and the extra heat
we need to remove from the body to keep it cool in hot
environments.

Our body is constantly generating energy to
maintain its internal functions as well as for doing external work. Additional heat
generated in this process must be released to the environment to to maintain the body
temperature at 37 degrees Celsius, even when the outside temperature is 37 degrees or
lower.

Humans, wearing light clothing, and not engaged in
any vigorous physical activity, feel most comfortable when the environmental temperature
is about 20 degrees Celsius. At temperatures lower than this, we feel cold and need to
protect ourselves by means such as extra clothing. As the environmental temperature
rises above 20 degrees we start feeling less comfortable, as body needs to employ
additional mechanisms such as air circulation and sweating to maintain the body
temperature at the optimum level.