Abstract:During the autumn of 2016, accompanied by higher surface air temperature, the national average of precipitation for China was much more than normal, ranked as the first since 1961. Particularly in the region to east of 110°E, the rainfall was 50% more for near half of the weather stations. These anomalies were closely associated with the air sea background in this season. When cold tongue developed in the equatorial middle and eastern Pacific in autumn, the western Pacific subtropical high would be stronger, stretching more westward and northward. Thus, more water vapor was transported to the north of China, coupled with the cold air activities carried by the northeast cold vortexes in early autumn and persistent trough near Baikal Lake later, giving rise to excessive rainfall. In addition, higher sea surface temperature in the equatorial western Pacific and warm pool intensified convections and increased typhoon activities, leading to more precipitation in east areas from South China to Yangtze Huaihe River Valley.