The mean annual rainfall from 2001 to 2012 was 3631 mm, with the highest average monthly precipitation (353
mm) occurring in November. The lowest average monthly precipitation (209 mm) was recorded in August.
According to the forest climate classification system of Schmidt and Ferguson (1951), the area is a type A (very
wet) tropical rainforest (monthly average rainfall > 100 mm). Since the location is between 5°N and 5°S, the study
site is also classified as having an equatorial climate (Tan, 2008), which is generally characterized by high
precipitation and high temperatures throughout the year.