The climate is characterized as tropical marine.
The weather is generally hot and very humid with little seasonal temperature variation. The mean high temperature is 86 °F (30 °C) and mean low is 76 °F (24 °C) with an average annual rainfall of 96 inches (2,180 mm).
Guam lies between 13.2°N and 13.7°N and between 144.6°E and 145.0°E, and has an area of 212 square miles (549 km2), making it the 32nd largest island of the United States.
The United States dollar denoted by the ISO 4217 code USD is the official currency of Guam. It is also referred to as the American dollar and is the official currency of the United States of America as well. One dollar is divided into hundred cents or pennies.