December weather forecast
Guánica, PR

The last month of the year, December, is characterized by further reduction in rainfall amounts, marking the onset of the dry season properly. With the reduction in rain and humidity compared to the wet season months, December sees a transformation in the landscape of Guánica, allowing for varied experiences. The consistently warm temperatures combined with sufficient daylight hours create an inviting atmosphere for outdoor activities. Whether lounging on the beach or exploring the diverse flora and fauna, there is considerable enjoyment to be had at this time of year. This pleasantly dry month bridges the gap between the old and the new year, bidding farewell to the lush wet season and welcoming the clear skies of the dry season.

Temperature

With the advent of December, Guánica's high-temperatures adjust to a still warm 82.4°F (28°C), closely aligning with the preceding month. Guánica experiences an average nighttime temperature of 73.2°F (22.9°C) in the month of December.

Heat index

December's mean heat index is calculated to be a tropical 89.6°F (32°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.
Heat index details are generally centered around shaded locations and a mild breeze. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 16.3 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. In Guánica, during the entire year, the rain falls for 224.9 days and collects up to 23.58" (599mm) of precipitation.

Snowfall

In Guánica, snow does not fall in January through August, October through December.

Ocean temperature

In Guánica, in December, the average water temperature is 81.9°F (27.7°C).
Note: Between 77°F (25°C) and 84.2°F (29°C), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

With an average of 11h and 6min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:43 am and sunset at 5:50 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:03 pm AST.

Sunshine

The average sunshine in December is 7.4h.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average maximum UV index of 6 in December leads to these recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Attention! UV radiation is markedly stronger with water and sand reflections.