How come when it is 98 degrees outside, our bodies get hot, even though that is the homeostatic core temperature of the human body?

The answer to this question would be revolving around heat transfer. As what you might have already known, heat transfer comes in 3 ways which are conduction, convection, and radiation. To add more to this, the heat that is being talked in here rises up and cooler air replaces it place. As our body is generating heat, it is released out of our body which then results to us being classified as warm-blooded. When the heat outside of our body is competing with our body's temperature, it would in turn block the heat released from our body causing us to feel hotter that usual.