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 The “archipelagic” and “oceanic” nature of the Mindanao Island and the existence of relatively high mountains make up the physical climatic controls that influence the climate of the municipality of Governor Generoso. The most important controls affecting the entire municipality are the northeast monsoon and the North Pacific Trade Winds. These are maritime tropical air masses characterized by a strong subsidence inversion at approximately a kilometer above the earth’s surface causing more rain at a lower level than higher levels. The northeast monsoon reaches Mindanao from the northeast and east direction bringing rains to the municipality during the months of December to January. The transition period between the northeast monsoon and the north pacific trade winds generally happens in the late February until the end of March causing gradual weakens of rains. In April, movement of the easterly waves usually combined with the northeast and east flow of the prevailing trade wind causes increase in rainfall as the longitude increases to the east. Month of May is the transition period between the trade wind season and southwest monsoon season prevalent during the months of July to September.

 The southwest monsoon prevailing wind from June to October reaches Mindanao Island and therefore the Municipality of Governor Generoso from the southwest and west. During this period, rainfall distribution is influenced by the vertical situation of the shoreline (convergence zone) between the south pacific trades (southeast monsoon) and southwest monsoon. Rainfall increases with altitude because of great depths of moist air. November is another transition period between the southwest and northeast monsoons.



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