Abstract:The main characteristics of the general atmospheric circulation in October 2014 are as follows: There was one polar vortex center in Northern Hemisphere. In the middle high latitudes, the circulation presented a five wave pattern. The southern trough was to the north and the subtropical high was almost same as its climatological mean. Meanwhile, monthly mean precipitation amount was 29.5 mm, which is 17.7% less than its climatological mean (35.8 mm). Monthly mean temperature was 11.2℃, which is 0.9℃ higher than its climatological mean (10.3℃). 51 stations observed extreme temperature drop events in one day in the south of Gansu, the east of Northeast and the Beijing Tianjin Hebei Region and 17 stations had events of extremely continuous drop in temperature in the east of Northeast. There were three severe rainfall processes, of which Hainan, Sichuan Basin, Guizhou to the middle and lower reaches of Changjiang River had heavy to torrential rains and some local areas had rainstorm to downpours from 27 to 31 October. Cold air was weak in October and only two cold air processes influenced China. Wide range of fog and haze weather appeared in central and eastern China 4 times. Moderate meteorological droughts were found in Jiangxi, the south and east of Hunan, the most part of Guangdong, the south and west of Fujian and the east of Guangxi.