Both are same, very hot with thunderstorms usually around 4.00pm but only for a short while and you'll be suprised how quick it dries up.
Everywhere inside is air-conditioned, so plenty of excuses to nip into the shops, "just to cool off a bit"
just take your time and drink plenty of fluids preferably water.
One year DD had to visit first aid for lie down and cool off as she was sick as she would only drink Coke, we now make sure she drinks lots of either water which she hates or Powerade.
We try and come out of the parks around 2.00pm and spend some time by the hotel pool or chilling in the room, before going back refreshed