There are two seasons in the country, the wet season and the dry season, based upon the amount of rainfall. This is dependent as well on your location in the country. 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 28.3 °C (82.9 °F)
Dry season is November into June and this is considered the best time to visit for diving, although diving can be done year ‘round. In fact, during rainy season in places like The Visayas, the sea flattens out and makes it easy to get to most any site. The rains are dictated by the amihan (northeast monsoon) and the hagabat (southwest monsoon). The southwest monsoon sometimes brings winds with it and that can make some sites inaccessible, so check with your dive operator about his particular region and how it is affected.
The Philippines are in the typhoon belt and occasionally get storms that blow across the western Pacific. There are 13 indigenous languages with at least one million native speakers: Tagalog, Cebuano, Ilokano, Hiligaynon, Waray-Waray, Kapampangan, Coastal Bikol, Pangasinan, Maranao, Maguindanao, Kinaray-a, and Tausug. One or more is spoken natively by more than 90% of the population.
The good news for visitors is that English is also very widely spoken. So communication in the Philippines is normally very easy. Menus are in English at restaurants and hotels and stores have English signage and English-speaking staff. Thus, the Philippines is considered one of the most visitor-friendly countries in Asia.