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.
Palau is divided into sixteen administrative regions, called states (the still separately listed Rock Islands did originally not belong to any state, but now belong to the state of Koror).