Abstract: Based on observations of air temperature and precipitation in Dandong from 1951 to 2014,the evolution and characteristics of mean air temperature,mean maximum and minimum temperature,as well as precipitation amount and days,were analyzed in this study.The results show that the annual mean air temperature in Dandong from 1951 to 2014 increases obviously,by about 1.5℃,which is larger than the increasing rate averaged in China.Seasonal mean air temperature also increases in Dandong,with the largest increasing rate in winter.The increase of annual mean minimum temperature is greater than that of the annual mean maximum temperature,resulting in an asymmetric growth.The mean daily temperature difference decreases in all seasons,especially in winter.Both precipitation amount and days decrease in all seasons,particularly in summer,except in spring,resulting in a decrease of the annual mean precipitation.