Abstract:In the summer of 2024, the overall climate of China was characterized by high temperature with more rainfall. The national average summer temperature ranked the first highest since 1961. The high temperature processes occurred earlier than normal, influenced more regions and had strong extremes. The overall precipitation was generally above normal, with a distribution of more in eastern China and less in western China. The precipitation was more than the normal by 50% to 100% in the southern part of Northeast China, central Inner Mongolia, eastern part of North China, northern part of East China, northern and southwestern parts of Central China, and eastern part of Northwest China. During this summer time, both the generated typhoons and the landfall typhoons were less than normal. The moderate intensity El Nino which began in May 2023 ended in May 2024 and transitioned to La Nina. At the same time, since the winter of 2023/2024, sea surface temperatures in the tropical Indian Ocean and North Atlantic have been at historical highs. The unusual distribution of tropical sea temperatures has been conducive to strengthening the Western Pacific subtropical high, which transported abundant moisture from Pacific Ocean and Indian Ocean to eastern China, resulting in widespread precipitation and frequent heavy precipitation processes in the eastern monsoon region of China.