I wear a mesh jacket and I do take a few sips of water from my camelbak (filled with ice and water) every 10 minutes when riding in the heat. If it should be extremely warm, I'll soak my helmet liner and T-shirt at rest stops, which is usually good for about two hours. I do these things in warm weather because I know that I should.
However, I have a problem where I don't feel much heat and almost never notice any humidity. I also seldom sweat (the exception being the closing ceremonies at Bloomsburg 2011). Below 80F when riding, I am usually wearing a long sleeve turtle neck because I am cold. Over the years, there have been heated debates around the house as to why the air conditioning should or should not be on.
However, I have a problem where I don't feel much heat and almost never notice any humidity. I also seldom sweat (the exception being the closing ceremonies at Bloomsburg 2011). Below 80F when riding, I am usually wearing a long sleeve turtle neck because I am cold. Over the years, there have been heated debates around the house as to why the air conditioning should or should not be on.