It is indicated in this paper that quasi-37-year, quasi-2-year and some other quasi-periodic climatic oscillations revealed from the analy sis of observational data can be explained by means of quasi-periodic regularity of the Moon’s motion relative to the Earth and the Sun. As an application of this viewpoint, some characteristic parameters are selected for the trajectory of the Moon’s motion and hence several methods are presented for the superlong-range prediction of the rainfall amount in the middle-lower reaches of the Yangtze River during the rainy season and of the transitional date for the east-west wind direction at the height of 23 km near the equator. The results obtained quite coincide with the reality.