December weather forecast
Charlotte Amalie, VI

December in Charlotte Amalie concludes the year on a slightly cool and damp note. The city’s festive spirit is complemented by the recorded average low temperature of 78.4°F (25.8°C). The pace of life subtly slows, matching the rhythm of the ubiquitous rainfall. The diminishing daylight redirects the city hustle, encouraging coziness and indoor activities. Despite the lower temperatures and reduced sunshine, December still holds charm and promises memorable experiences with its unique weather blending.

Temperature

The commencement of December in Charlotte Amalie introduces an average high-temperature of a still moderately hot 80.6°F (27°C), closely mirroring the preceding month. In December, Charlotte Amalie temperatures settle at a low of 78.4°F (25.8°C) during the nights, reflecting a minor change from daytime highs.

Heat index

December's mean heat index is appraised at 84.2°F (29°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

January through March, October through December, with an average relative humidity of 75%, are the least humid months.

Rainfall

In Charlotte Amalie, in December, during 22.6 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 253.1 rainfall days, and 33.27" (845mm) of precipitation is accumulated.

Ocean temperature

In Charlotte Amalie, in December, the average water temperature is 81.3°F (27.4°C).
Note: Swimming, diving, and other water-related activities in temperatures between 77°F (25°C) and 84.2°F (29°C) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

December has the shortest days of the year, with an average of 11h and 6min of daylight.
On the first day of December in Charlotte Amalie, sunrise is at 6:35 am and sunset at 5:42 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 5:54 pm AST.

Sunshine

The months with the least sunshine in Charlotte Amalie are November and December, with an average of 6.5h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Charlotte Amalie. The months with the lowest UV index in Charlotte Amalie are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 7 suggests this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Caution! Sand and water surfaces escalate the UV intensity from the Sun.