Originally Posted by
colombo357
Yes, both are factors, but equating them is ridiculous. High heat and humidity doesn't slow you down to a sub-10mph crawl (6mph if you're n00b in Cali).
No, but the heat and humidity absolutely zaps your energy. I grew up in MS and now live in Southern Indiana - it is a world of difference. Think about your fall rides compared to your summer afternoon rides; worlds apart.
Besides, a century is a century. If someone doesn't like it, don't do it.