December weather forecast
Rincon, PR

December rings in the year's end with the onset of cool winter breezes blowing across Rincon, Puerto Rico. Emphasizing a stark contrast to the summer sorcery, the rain chart takes a plunge, showing a minimum of 1.54" (39mm) of precipitation for the year. A noteworthy pattern develops in the visibility conditions, staying constant at six miles throughout the year. The slightly lower sea temperature of 81.9°F (27.7°C) still encourages a multitude of activities on the sandy beaches. December's weather evolution marks a tranquil end to the climatic spectacle of Puerto Rico, preserving its warmth and brightness under winter's cool shroud.

Temperature

December reports an average high-temperature of a still moderately hot 81.5°F (27.5°C), slightly varied from November's 82.9°F (28.3°C). Nighttime temperatures during December report a consistent average of 76.5°F (24.7°C).

Heat index

The average heat index in December is evaluated at a tropical 86°F (30°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.
For clarity, heat index numbers account for light winds and areas under shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.

Humidity

In Rincon, the average relative humidity in December is 76%.

Rainfall

In Rincon, in December, during 16.7 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Rincon, during the entire year, the rain falls for 235.5 days and collects up to 31.97" (812mm) of precipitation.

Ocean temperature

In Rincon, in December, the average water temperature is 81.9°F (27.7°C).
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

The month with the shortest days is December, with an average of 11h and 6min of daylight.
On the first day of the month, sunrise is at 6:45 am and sunset at 5:51 pm. On the last day of December, sunrise is at 7:00 am and sunset at 6:03 pm AST.

Sunshine

In December, the average sunshine is 7.6h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take note! The UV strength of the Sun elevates when reflected off water and sand.