We were there this week: the highs were in the upper 70s and lows in the mid 50s. We wore hoodies in the early AM and late PM with shorts or jeans most of the week. We were a bit cold one night, but hats/hoodies helped as did huddling together while watching Fantasmic/parades. We just stashed our hoodies/sweaters in a locker during the day, and re-dressed for the evenings. It felt a lot like our late springs/early summer (we're from the north west).
When we got home late Thursday night it was 45f (~8C), and it felt so much colder. I think the breeze off the ocean here is much cooler than in CA, as it was really only a few degrees colder.