Climate
The Philippines has a tropical climate. At sea level, temperatures rarely fall below 27 degree celcius. Interior valleys and leeward sides of islands tend to be warmer, while mountain slopes and peaks and windward sides of islands tend to be cooler. Rainfall averages about 2,030 mm. a year. Tropical storms are common from June to October; each year about 20 typhoons strike the Philippines, mostly on the eastern coasts of Luzon and Samar.