Abstract:The main characteristics of the general atmospheric circulation in September 2022 are as follows. There was a single polar vortex center in the Northern Hemisphere and it was weaker than normal. The circulation at the mid-high latitudes of the Eurasian was mainly dominated by zonal circulation, presenting a weak “two troughs and one ridge” situation. The western pacific subtropical high was stronger than that of the climatological normal, located eastward compared to that in the same period of normal years. The monthly mean temperature was 17.9℃, higher than normal (16.9℃) by 1.0℃. The monthly mean precipitation was 49.4 mm, 24% less than normal (65.3 mm). During this month, China had four torrential rain processes with strong precipitation intensities and at many stations the rainfall surpassed the historical records. Seven typhoons formed over the western North Pacific and the South China Sea in September, but only one of them, i.e., the Severe Typhoon Muifa (No.2212), made landfall four times in China. Then, the Super Typhoon Noru (No.2216) affected the South China Sea and the South China Region. So, the number of generated typhoons was higher than normal, but the landing typhoons were fewer. In addition, the continuous lack of rain in the middle and lower reaches of Yangtze River led to sustained drought above moderate magnitude.