Weather conditions in Xi around Tomb-Sweeping Day in 2008.

I have lived in Xi for nearly 30 years. Almost every year around Tomb-Sweeping Day, Zhou Xiaoyu and Tomb-Sweeping Day will be next on April 4th. Put it in the middle, it will rain three days in advance and three days later, which may be intermittent. I don't know why it's so accurate. Grandma said it was because Tomb-Sweeping Day was the day when the deceased returned home, and it was usually wet and rainy from April/kloc-0 to July, because ghosts don't go by land. This statement is superstitious, but it also makes sense. !