December weather forecast
Punta Santiago, PR

By December, the weather in Punta Santiago has cooled considerably. The sea temperature drops significantly affecting the overall temperature and atmospheric pressure. The decrease in daylight hours is offset by a reduction in cloud cover, allowing for a greater amount of sunshine. Even with longer nights, the uv-index continues to register a rating of 7. Amidst these changes, the lower temperature dips to around 75.7°F (24.3°C) with rainfall measures lowering to 2.68" (68mm) over approximately 21.4 days.

Temperature

An average high-temperature of a still moderately hot 80.6°F (27°C) marks December, exhibiting a close resemblance to the conditions in November. In December, Punta Santiago temperatures settle at a low of 75.7°F (24.3°C) during the nights, reflecting a minor change from daytime highs.

Heat index

The heat index value for December is calculated to be a tropical 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Always consider that heat index estimations are for light winds and places in the shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In December, in Punta Santiago, the rain falls for 21.4 days. Throughout December, 2.68" (68mm) of precipitation is accumulated. In Punta Santiago, Puerto Rico, during the entire year, the rain falls for 268.8 days and collects up to 38.58" (980mm) of precipitation.

Ocean temperature

In Punta Santiago, in December, the average water temperature is 81.9°F (27.7°C).
Note: For activities such as swimming and diving, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

The month with the shortest days is December, with an average of 11h and 6min of daylight.
On the first day of December in Punta Santiago, sunrise is at 6:38 am and sunset at 5:45 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 5:58 pm AST.

Sunshine

With an average of 6.4h of sunshine, December has the least sunshine of the year in Punta Santiago.

UV index

The months with the highest UV index in Punta Santiago are April through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in December translates into this advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.