It's pretty warm right now - it's funny, DH and I are from Florida and think it's quite pleasant and all we keep seeing on the news is people complaining about the heat!!!
As hot as it is during the day though, I still wore a sweater at night.
California Adventure didn't seem too crowded on friday - we walked on most rides, the only ones we waited on were Toy Story Mania (10-15 mins) and Tower of Terror (13 mins

) We had a plan so maybe that helped!
Yesterday at DL it was more crowded, but we got there really early and managed to do almost every single ride, plus we took an afternoon break. If you plan it out, it really is easy to get everything done.