You haven’t lived misery until you’ve been cold and wet in a packed MK. At least wet in August feels refreshing(ish).
HAHA. So true.
I think the OP chose heat over crowds, but I'll play anyway, since reading these threads is a little like my vicarious escape. And since we just bought DVC we are expanding our idea of when we'd like to go. I never thought I'd be away from home for Thanksgiving, but we are going to WDW over Thanksgiving break this year.
I abhor the heat, yet - my sister and I both have summer birthdays, and my parents were school teachers for a long time, so all my best memories of WDW as a kid involved going in the super heat and humidity. As a young adult, I lived in NC for 5 years, summers included, and I survived. So I have learned how to deal with heat, even though I don't like it.
We now live in NY - and many years ago, before kids, DH and I decided to take a long weekend in December because flights were randomly cheap and we found a good deal on a room. We almost didn't make it - our flight was the last to leave NYC as a nor'easter blew in, and takeoff was actually a little scary. We got the WDW and loved it - the weather was heavenly, and crowds were low.
We've since been a number of times in the late summer (DH, DD1 and my birthdays fall in July, August and Labor Day weekend - it's unavoidable), and while the heat is really uncomfortable, we have worked out how we deal with heat - just like all the PPs, we spend an early AM in the parks and leave for lunch, and maybe come back in the evening. There's lots of pool time if there aren't thunderstorms. If there are, we will head back to a park earlier, and do indoor attractions and rides. We are like the salmon swimming upstream in late afternoon while everyone else streams out of the park. HAHA. We *definitely* use TS ADRs to get a break as well. I love not having to wait very much, and having mostly empty photo ops. Also - rides can break down - one time on our last trip (President's week, so not crowd level 10, but pretty close), 7DMT, Splash and Space mountain AND POTC broke down all around the same time. It was also unseasonably hot, so we had some heat PLUS massive crowds on everything else. So, even in good weather, you can sometimes end up in unexpected crowds.
For the rain, we wear water shoes, bring ponchos, and clothes we don't mind getting wet in - we just pretend we are going to a water park.