Abstract:The main characteristics of the general atmospheric circulation in October 2022 are as follows. There was a single polar vortex center in the Northern Hemisphere, which was stronger than normal. The circulation at middle-high latitudes of the Eurasian showed the “two troughs and one ridge” pattern. Compared to the normal state, the Western Pacific subtropical high was stronger, and the location was westward and northward. The monthly mean temperature was 10.8℃, higher than the normal value (10.6℃) by 0.2℃. The monthly mean precipitation was 34.4 mm, 3.4% less than normal (35.6 mm). There were two torrential rain processes in China in October: one was affected by the upper-air trough, low-level jet and subtropical high, and the other by the No.2222 Typhoon Nalgae and the high trough. In October, a total of five tropical cyclones were active in the South China Sea and the western North Pacific, with the number of the tropical cyclones more than normal by 1.2. There were no landing typhoons, fewer than normal. Among them, Typhoon Sanka (No.2219), Typhoon Nansha (No.2220) and Typhoon Nalgae (No.2222) affected the South China Sea, Hainan Island and South China. The meteorological drought to the north of the Yangtze River got relieved, but the drought to the south of the Yangtze River persisted.