July 4, 1776: The day Thomas Jefferson went shopping

By Harmeet Kaur, CNN (CNN) — As dawn broke in Philadelphia on July 4, 1776, the weather was a pleasant 68 degrees. The temperature crept up to 72.25 degrees at 9 a.m., reaching a balmy 76 by 1 p.m. before dipping slightly to 73.5 at 9 p.m. We know this because on the day that