Next, stay hydrated with fruits! A lot of people do not realize that the darker the fruit is [not the skin], the more nutritious it is. Eat a lot of oranges, red grapes, peaches, watermelon, and berries. Not only will they satisfy your craving for something sweet - they will also help you stay hydrated in the heat!
Finally, settle on six small meals rather than three. Simply put - snack all day. I have absolutely no appetite in the summer. The heat makes me miserable and ultimately makes me not want to eat. Try writing down a "basic" daily meal plan and stick to it.
Here is mine:
Egg whites in the morning.
An orange at 10.
Organic spring greens at noon with a string cheese [yummmm].
Almonds at 2.
Grilled chicken and a small salad for dinner.
Obvy - you can sub out fruits at 10 and the veggie you eat with dinner. I stand strong in my "salad and cheese" for lunch. It's light yet filling enough to hold you over until your next snack. The point is to have an understanding of what you're going to eat throughout the day so that at lunch you don't say, "Oh man.. what am I going to do about lunch?" This keeps you from grabbing a frap on your way to work or indulging at Arby's on your way home. You will have something to look forward to every couple of hours.