The seasonal and annual variations of temperature and precipitation observed in Dalian from 1914 to 2013 were analyzed by using the methods of one-dimensional linear regression, wavelet analysis and climate trend coefficient. The results show that the variation of temperature in Dalian city was generally consistent with that of the whole nation, with an annual average temperature rising rate of 0.12 ℃·(10a)~(-1). There were two alternating periods between cold and warm demarcated in the middle of the 1950s, and two abruptly warming in 1930 and 1982. The most notable warming was after the 1990s. The last hundred years were a precipitation slightly decreasing period in Dalian city, with a rate of 4.57 mm (10a)~(-1), when temperature has obviously rising. The precipitation change had both significant periodicity and features of multiple time scale. Seasonal variation of precipitation in Dalian city was quite obvious, and the maximum amplitude of precipitation anomalies was in rainy seasons, especially in July and August. However, the month, when the peak precipitation took place, was shifted from year to year.