Abstract:The main characteristics of the general atmospheric circulation in August 2018 were as follows. There was one polar vortex center in the Northern Hemisphere and stronger than usual. The circulation in Eurasian middle high latitudes showed a multi wave pattern. The strength of western North Pacific subtropical high was much stronger and the location was west compared to normal years. The monthly mean temperature was 21.9℃, 1.1℃ higher than normal, which ranks the fourth highest since 1961. The monthly mean precipitation amount was 127.7 mm, which was more than normal (105.3 mm) by 21.3%, and the precipitation in central China was less than usual. Eleven rainfall processes with some extreme records occurred in China this month. Ten tropical cyclones were active over the western North Pacific and the South China Sea. Among them, Typhoons Jongdari (1812), Yagi (1814), Bebinca (1816) and Rumbia (1812) made landfall in China. The total and landing numbers of tropical cyclones were more than usual. Long lasting high temperature events happened in central and eastern China. Meanwhile, convection events occurred frequently with a wide range of influencing areas.