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's weather in Rincon, Puerto Rico, records an average high-temperature of a still moderately hot 81.5°F (27.5°C), showing little deviation from November. The nighttime temperature demonstrates a marginal decline, averaging at a still warm 76.5°F (24.7°C) during December.

Heat index

In December, the average heat index is evaluated at a hot 86°F (30°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
The heat index's values are generally associated with conditions in shade and light breezes. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital 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

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

Rainfall

In Rincon, during December, the rain falls for 16.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Rincon, Puerto Rico, during the entire year, the rain falls for 235.5 days and collects up to 31.97" (812mm) of precipitation.

Ocean temperature

In December, the average ocean temperature in Rincon, Puerto Rico, is 81.9°F (27.7°C).
Note: For swimming, diving, and various water activities, the temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as highly enjoyable and comfortable for extended durations without any discomfort.

Daylight

December has the shortest days of the year, 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

January through December, with an average maximum UV index of 7, are months with the highest UV index in Rincon. The months with the lowest UV index in Rincon are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 7 suggests this advice:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be alert! The reflection of water and sand augments UV radiation intensity.