Health insurance is strongly advised, owing to the high cost of health care. There is one civilian hospital, the Guam Memorial Hospital, and a number of private clinics, as well as some medical facilities run for US military personnel. For emergencies dial 911.
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).