It can vary greatly but both times I went in November it was high 70s, low 80s in the day time and high 50s-low 60s at night. So, you need a sweatshirt in morning and night but during the day it warms up.
That said, we have had a very unusual year here in California. We haven't had much of a summer.
Warmer than you're used to in Long Island. Think layers -- wear a jacket or a hoodie that you can peel off. If you go to Fantasmic or World of Color at night you may need to bundle up; at least I did. You may find it refreshingly warm.