Abstract: The influence of urbanization on the local climate of Nanchang city during the past 50 years was analyzed in conjunction with the urban development data.The results show that the increasing amplitude of the aver-age temperature in the urban area Nanchang city during the past 50 years is about 1.07℃.The increasing rate in temperature is about 0.21℃ per decade.In the suburban area,the increasing amplitude and increasing rate of aver-age temperature is about 0.54℃ and 0.11℃ per decade,respectively.From the 1960s,the heat island intensity in Nanchang city has been showing an upward trend.The heat island intensity is 1.0℃,and the increasing rate is 0.11℃ per decade.There are some high temperature centers in Nanchang city.It represents a multi-center distribution of the heat island phenomenon.The global warming and urban development play a significant impact on the minimum temperature in Nanchang city.In the past 50 years,the average minimum temperature in urban areas is 1.83℃ higher than that in the suburbs.The annual amount of rainfall in both urban and suburban areas shows an upward trend,with an increasing rate of 28.67 mm and 6.99 mm per decade,respectively.The monthly average a-mount of precipitation in the urban area is higher than that in the suburbs in the first half of the year.There is a"rain island"effect extend to a certain extent in this city.The rainfall-center and spatial distribution in different sea-sons are different.