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With the methods of moving average and moving variance, an analysis is made of the temperature and precipitation over Jilin from 1951 to 2008. The results show that temperature over Jilin tends to ascend, with the average temperature ascending speed being 0.10 ℃/10a greater than that over the whole China, but 0.03 ℃/10a lower than that over Northeast China. Annual precipitation tends to decrease overall. Precipitation in spring shows a tendency of ascending, while precipitation in summer shows a decreasing tendency at present. There is no obvious change in precipitation in autumn, and there is a gradual increase tendency in snowy in winter. The variability of precipitations was obviously greater than that of temperature, and the variability of snow in winter was obviously greater than that of rainfall in summer. 〖JP2〗The analysis of NCEP data shows that the trough of East Asia lasted for a longer time in cold winters, while the trough of East Asia was weaker and a little eastward in warm winters. In wet years, the subtropical high over West Pacific was stronger and more northward, and there was a significant abnormal low in the areas around Lake Baikal, with the strong farther southern flow over Northeast China.