The following are the main characteristics of the general circulation of atmosphere in June 2013. There was only one polar vortex center, whose center was near Greenland, in the Northern Hemisphere with weaker strength compared to normal years. More high level troughs were active in middle high latitudes. The northwestern Pacific subtropical high was weaker than normal. The monthly mean precipitation amount was 99.9 mm, near climatological normal (99.3 mm). The monthly mean temperature was 20.7℃, being 0.7℃ higher than normal (20.0℃). Seven heavy rainfall processes occurred in this month and extreme daily precipitation was recorded at many stations and some places suffered from severe floods. On June 23, the region of middle and lower reaches of Yangtze River stepped into Meiyu period, and out of it on the 29th. Besides, large scale hot weather hit the Southern China for the first time this year. The tropical storm “Bebinca” became the first tropical storm landing China this year, and the time of landing was earlier than normal.