I am sorry, but since I left Brazil, I have never had a perfect day again, especially in the summer. The only things that sustain me now are God, my studies, my music, classical music, and the piano. In Brazil, every day felt like worth living to the fullest, and every day was special. Here each day is nothing but another normal day, or worse. And I must say, I got used to it.
So the closest that I can get to a perfect summer day (In Texas):
Very heavy rain
Rachmaninoff's Prelude Op. 23 No. 5 playing on the background.
That is about it. It is just way too hot to go outside (Texas summer)