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The statistical relation between precipitation in mid-summer in Tianjin and circulation features over North China in early summer was analyzed. It is shown that when the North China High was stronger in early summer, the precipitation over Tianjin was less than normal in mid-summer, and vice versa. Furthermore, the causes for more-than-normal precipitation in mid-summer in Tianjin before 1980 and less-than-normal precipitation after 1980 were studied preliminarily. Hereby, a short-range climatic prediction method of precipitation in Tianjin by atmospheric circulation in early summer was developed, which performed well in the trial operation from 1998 to 2003.