December weather forecast
Vega Baja, PR

December marks the low point in Vega Baja's annual temperature cycle. The city experiences its coldest temperature of the year, dropping to 81.3°F (27.4°C) during the day and 75.2°F (24°C) at night. With a wind speed of 9.3mph (15km/h), the chill factor considerably increases. Despite the overall lower temperatures, December presents a comfortable and festive atmosphere, making it a perfect time for holiday celebrations. As the month concludes, Vega Baja awaits another cycle of diverse weather patterns in the new year.

Temperature

December's weather in Vega Baja displays an average high-temperature of a still warm 81.3°F (27.4°C), slightly varied from November's 82.8°F (28.2°C). The nights of December in Vega Baja cool down to an average low of 75.2°F (24°C), subtly lower than daytime highs.

Heat index

For most parts of December, the heat index is estimated at a tropical 86°F (30°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.
Heat index determinations are made taking into account the shade and light air movements. 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 'felt air temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. 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 particularly meaningful for babies and toddlers. 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 December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 14.4 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Vega Baja, during the entire year, the rain falls for 213.7 days and collects up to 28.66" (728mm) of precipitation.

Daylight

With an average of 11h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:41 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:00 pm AST.

Sunshine

In Vega Baja, the average sunshine in December is 6.9h.

UV index

January through March and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 6 in December, converts into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.