It is well known that the distributions of temperature and precipitation show the different type between th eastern and western side of the continent. In this paper this character is discussed in relation to the meridional thermal mixing. For this purpose, the following approaches are taken. 1) The longitude with the maximum number of blocking is compared with the longitude on the west side of the continent where the divergence of isotherms is most remarkable or the temperature gradient is minimum. It is clear that both longitudes coincide well (paragraph 4). 2) The distribution of the amplitude of westerly wave whose wave length is 40° of longitude is computed (Fig. 6). Comparing this figure with the longitude where the isotherms are diverging, it is easily observed that the maximum amplitude coincides well in longitude with the diverging isotherms (paragraph 5). 3) Analogously, the distributions of the percentage frequency of cyclones and anticyclones passing through the centers in squares of 100, 000km2 (Figs. 8 (a) and (b)), the standard deviations of daily pressure at sea level (Fig. 9) and the standard deviations in January and July (Figs. 10 (a) and (b)) are obtained. It is concluded that the maximum regions with these elements coincide also well with the diverging isotherms in their longitudes. 4) Thus, all the elements mentioned above show the maximum on the western side of the continent. 5) Similarly, it is observed that all the elements mentioned above show the minimum over the area along the longitudinal line on which the isotherm converges with the steepest temperature gradient. The physical explanation of the described facts is as follows. The above elements relate closely to the distribution of the magnitude of disturbances over the globe, and the larger value is accompanied by the larger disturbances. It means that the meridional thermal exchange is larger on the western side of the continent than that of the eastern side because the disturbance at the latter is smaller than that of the former. Thus, it is evident that the following characteristics on thermal distribution are easily explainable. 1) On the western side of the continent: at high latitude it has higher temperature than that of the east, while lower temperature prevails at low latitude. 2) On the eastern side of the continent: at high latitude lower temperature prevails than that of the west, while warmer at low latitude. Furthermore, comparing the cross sections along the longitudinal line (Figs. 5 (a) and (b)), we can find the trend that the lower (or higher) temperature along a longitudinal line is nearly compensated by the higher (or lower) temperature along the same line. In the last paragraph 9 of this paper the distribution of annual precipitation is discussed. As the vapour pressure in the atmosphere is decided approximately by the air temperature distribution in a global scale, the isolines of precipitable water content diverge on the west side and converge on the east of the continent. In other words, analogous pattern to the isotherms is observed. Precipitation pattern accompanying the above isolines of precipitable water contents is considered (Fig. 13 (a)). Adding this precipitation pattern to its normal pattern (Fig. 13 (b)) expected from the idealized general circulation, we can obtain the model pattern (Fig. 13 (c)) showing the geographical distribution of the annual precipitation on the continent. This pattern coincides well with the observed reslts.