Seoul’s climate is characterized by a large annual range of temperature. The coldest month, January, has a mean temperature of about 26 °F (−3 °C), and the warmest month, August, has a mean temperature of about 78 °F (25 °C). Yearly precipitation in the city is approximately 54 inches (1,370 mm), with a heavy concentration during the summer months. Air pollution in the basin and in Yeongdeungpo, an industrial area in the southwest, just south of the river, has become a serious problem, caused in large part by the increasing number of automobiles and factories. For years the Han was ...(100 of 3325 words)