<P> The average year - round temperature measured from all the weather stations in the Philippines, except Baguio City, is 26.6 ° C (79.9 ° F). Cooler days are usually felt in the month of January with temperature averaging at 25.5 ° C (77.9 ° F) and the warmest days, in the month of May with a mean of 28.3 ° C (82.9 ° F). Elevation factors significantly in the variation of temperature in the Philippines . In Baguio City, with an elevation of 1,500 m (4,900 ft) above sea level, the mean average is 18.3 ° C (64.9 ° F) or cooler by about 4.3 ° C (8 ° F). In 1915, a one - year study was conducted by William H. Brown of the Philippine Journal of Science on top of Mount Banahaw at 2,100 m (6,900 ft) elevation . The mean temperature measured was 18.6 ° C (65.5 ° F), a difference of 10 ° C (18 ° F) from the lowland mean temperature . </P> <P> Relative humidity is high in the Philippines . A high amount of moisture or vapor in the air makes hot temperatures feel hotter . This quantity of moisture is due to different factors--the extraordinary evaporation from the seas that surrounds the country on all sides, to the different prevailing winds in the different seasons of the year, and finally, to the abundant rains so common in a tropical country . The first may be considered as general causes of the great humidity, which is generally observed in all the islands throughout the year . The last two may influence the different degree of humidity for the different months of the year and for the different regions of the archipelago . </P> <P> The climate of the country is divided into two main seasons: </P> <Ol> <Li> the rainy season, from June to October; </Li> <Li> the dry season, from November to May . The dry season may be subdivided further into (a) the cool dry season, from November to February; and (b) the hot dry season, from March to May . The months of April and May, the hot and dry months when schools are on their long break between academic years, is referred to as summer while in most of the northern hemisphere those months are part of spring . </Li> </Ol>

Factors affecting the weather patterns in the philippines