It's muggy from May to November here. Today, at least, it was overcast, so it felt like a reprieve with the sun not beating down on you. I did a metric century charity ride last Sunday and it was brutal hot. I had to stop at mile 50 for a bit and cool down. I'd stopped sweating and had goose bumps. Not good. I know some people around here start out at 4AM when riding distances (80+) to avoid the sun/heat.