December weather forecast
Saint John, VI

Closing the year, December in Saint John brings the cool breath of winter mixed with a tropical climate. The slower pace of the city matches the gentle coolness in the air. While the temperature sees a minor dip, December’s significant change lies in its reduced rainfall, going down to 4.7" (119mm). Captivating locals and tourists alike, Saint John’s December weather, with its mix of warm days and cool nights, provides an ideal setting for holiday festivities and year-end celebrations.

Temperature

Saint John's coldest season falls during January through March and December, averaging a high-temperature of 82.4°F (28°C).

Rainfall

In December, in Saint John, the rain falls for 14 days. Throughout December, 4.69" (119mm) of precipitation is accumulated. In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.69" (1262mm) of precipitation.

Ocean temperature

In Saint John, the average seawater temperature in December is 80.6°F (27°C).
Note: Surface water temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

With an average of 11h and 6min of daylight, December has the shortest days of the year in Saint John, United States Virgin Islands.
On the first day of the month, sunrise is at 6:35 am and sunset at 5:41 pm. On the last day of December, sunrise is at 6:50 am and sunset at 5:53 pm AST.

Sunshine

The months with the least sunshine in Saint John are November and December, with an average of 7h of sunshine.

UV index

December is the month with the lowest UV index in Saint John, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In December, a daily UV index of 7 turns into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be alert! The reflection of water and sand augments UV radiation intensity.