Every year from June/kloc-0 to September 30th is the flood season in Yantai, and precipitation will increase during the flood season.

The most obvious period of increase is from the end of June or early July to the end of August or early September every year, which is the rainy season in Yantai. "These two months will be the most rainy and frequent period in Yantai. This climate has been like this for 30 years.