The population of Palau is approximately 21,000, of whom 70% are native Palauans of mixed Melanesian, Micronesian, and Austronesian descent. Many Palauans also have some Asian ancestry, from intermarriage between settlers and Palauans beginning in the 19th and 20th centuries.
Roman Catholicism is the dominant religion in Palau; approximately 65% of the population are members. Estimates of other religious groups with a sizable membership include the Evangelical Church, 2,000; Seventh-day Adventists, 1,000; The Church of Jesus Christ of Latter-day Saints (Mormons), 300; and Jehovah's Witnesses, 90.
Palau has a tropical climate with an annual mean temperature of 82 °F (28 °C). Rainfall is heavy throughout the year, averaging 150 inches (3,800 mm). The average humidity is 82% and although rain falls more frequently between July and October, there is still much sunshine.