There are really only three temperatures on the Mexican Riviera: hot, hotter and hottest; late October-early November falls in the middle catagory. I was there about that time just last year and the daytime temperatures were in the high 80's to low 90's and very humid.
But there are things you can do to stay comfortable. Lightweight and loose-fitting cottons and lightweight footwear will help. Don't forget the sunscreen, sunglasses and a lightweight head covering. Wide-brimmed straw hats are availabe everywhere and in all price ranges and styles and come in very handy. Drink lots of water and avoid alcohol and caffeine in the hottest part of the day.
The ship is air conditioned throughout and on deck you are never far from a pool. Take plenty of water if you go on any excursions--or it is readily availabe almost everywhere.
Have a wonderful cruise and congratulation on the marriage.