Rain Day originated in the Daly & Spraggs Drug Store in Waynesburg, PA. A farmer mentioned to the pharmacist that it would rain the next day, July 29, because it was his birthday and it always rains on his birthday. Intrigued, Byron Daly began betting store customers, salesmen and townspeople that it would rain on July 29. The wager? A hat, which Daly always won. Daly’s son, John Daly, continued the tradition in later years, and today, Waynesburg’s Special Events Commission continues the tradition and has won hats from TV weathermen and celebrities, including NBC’s Today Show’s then weatherman Willard Scott, Jay Leno, Troy Aikman and the Dixie Chicks.
As of July 29, 2010, it has rained 112 out of 136 years in Waynesburg on July 29.