Why does it rain in the middle and lower reaches of the Yangtze River during the Dragon Boat Festival every year?

Questioning itself is not rigorous, and it doesn't rain every year in the middle and lower reaches of the Yangtze River.

The lunar calendar is a lunar calendar. If you want to judge sunny and rainy days by the lunar calendar, you can only look at the solar terms and judge the probability roughly. Judging by the date of the lunar calendar, farmers can't farm.

For example, this year's Dragon Boat Festival is just a mountain, and the probability of rain in Wuxi 15 years is 26. 6%, only four years of rainfall,

Next year's Dragon Boat Festival is from summer to the next two days, which is the rainy season in Wuxi. Recently 15, the probability of rain on the day of summer solstice in Wuxi is 86. 67%,

On the whole, the Dragon Boat Festival will basically fall between five days after Xiaoman and five days after the summer solstice, that is, between May 26th and June 25th in the new calendar, that is, when the middle and lower reaches of the Yangtze River gradually enter the rainy season. It is not surprising that it rains a little more, but there is no guarantee that it will rain 100%.