The FSM enjoys a tropical climate, with relatively even, warm temperatures throughout the year.
The climate in the FSM averages 80° F year round, with highs in the high 80s and lows in the high 70s. Rainfall is heaviest during the summer months. The rainfall on each island varies, however, so check with the local visitor authority for anticipated dry and wet seasons. Trade winds come mainly from the northeast from December through June. Light tropical clothing is the norm year ’round in the FSM.
Pohnpei reputedly is one of the wettest places on Earth, with some locations on the interior of the island receiving up to 330 inches of rain per year. The trade wind season generally occurs from December to March.
The Federated States of Micronesia (FSM) is a grouping of 607 small islands in the Western Pacific about 2,500 miles southwest of Hawaii, lying just above the Equator. Generally speaking, the FSM comprises what is known as the Western and Eastern Caroline Islands.
While the country’s total land area amounts to only 270.8 square miles, it occupies more than one million square miles of the Pacific Ocean, and ranges 1,700 miles from West (Yap) to East (Kosrae) . Each of the four States centers around one or more “high islands,” and all but Kosrae include numerous atolls.
Yap State is made up of 4 large islands, 7 small islands and 134 atolls, with a total land area of 45.6 square miles. Chuuk State has a total land area of 49.2 square miles and includes seven major island groups. Pohnpei State has 133.4 square miles of land area, of which 130 is accounted for by Pohnpei island, the largest in FSM. Kosrae is essentially one high island of 42.3 square miles.
The islands of the FSM are the result of volcanic activity millions of years ago resulting in islands and atolls of incredible variety. Some are tips of mountain peaks thrust above the surface and now surrounded by fringing reefs. Others are atolls — islands that have sunk beneath the surface, leaving a ring of coral barrier reef and tiny island islets encircling a coral and sand lagoon. And, still others, are mixtures of atolls and high rigged islands within a lagoon.