My condo in northern Va was ridiculously hot too. Turns out my hot water pipes circulated hot water through the pipes in the walls as a method to warm the place, but even after I learned that and shut down the circulation system in the Summer months, it was still very hot. I also had an electric space heater installed in an exterior utility closet so pipes wouldn't freeze in the winter. Had no idea that was there until I called someone thinking the water heater was too hot.
Even in NoVa, where it gets below freezing in winter, I never ever turned the heat on during the five years I lived there. I usually kept my balcony door open at night in the winter to cool it enough to sleep. On a few occasions when all neighbors left for a holiday weekend, if I got cold, I'd just use the oven or dryer and the place would heat up immediately.
I had a condo in Atlanta with much more exterior area and it was 50 years old and still kept cooler in the summer than the brand new condo in NoVa.