Diet: I'm going to assume you are bulking- chicken, brown rice, sweet potatoes, turkey, beef, fish, oatmeal, eggs. Lots of it. 6-8 meals a day. What's your body weight and body fat %? This will help determine what your macros should be for the day.
As far as the heat and humidity, do you feel it's affecting your diet or your training? Or both. I can see how it would affect your training, but I'm lost on the diet aspect of it. You train inside?
Hope this helps, and I'll see what else I can do when you tell us a little more.
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"I try not to allow what others are doing influence my own decisions. You've got to make decisions for yourself; you've got to be true to yourself. Because if you let what others are doing influence what you do, you really have nothing left of yourself." | 
