But as I said, even though the sun is at the highest point in the sky at 12, it was still rising in the hours leading up to that moment. By 3 o'clock however, the heat from the noon has already warmed the surface of the Earth and everything feels hotter, even if the sun is beginning to set.
http://www.wisegeek.org/what-is-the-warmest-time-of-the-day.htm
This has thread had turned into SCIENCE! 2.0...