Weather in December
An excellent water temperature of 83.1°F (28.4°C) makes December
National Wildlife Refuge, Guam, a prime for swimming and other water activities.
In Guam National Wildlife Refuge, Guam, the average seawater temperature in December is 83.1°F (28.4°C).Note
: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.
With an average of 11h and 20min of daylight, December has the shortest days of the year in Guam National Wildlife Refuge.
On the first day of the month, sunrise is at 6:27 am and sunset at 5:50 pm. On the last day of December, sunrise is at 6:43 am and sunset at 6:03 pm ChST.