Baiu is deemed to have ended when activities of the baiu front are weakened by expansion of strength of the Pacific anticyclone or the baiu front has been forced to move the north of each area and no rain is expected because of the influence of the front.
梅雨前線の活動が太平洋高気圧の勢力拡大によって弱まるか、各地域の北側に押し上げられ、今後前線の影響による雨が降らない状況になったとき、梅雨が終わったとみなされる。