December weather forecast
Guardalavaca, Cuba

December offers a somewhat milder climate in Guardalavaca, with evening temperatures dropping to 23.8°C (74.8°F). A significant decrease in rainfall from November to 34mm (1.34") invites the onset of the drier season. The sea temperature dips to its year’s low of 26°C (78.8°F), but still remains inviting for those who enjoy water activities. With longer nights, the daylight hours reduce, although clear, sunny days continue to be a common sight. December encapsulates mild breezes, pleasant temperatures, and relatively less rain, which create a quintessentially Caribbean winter experience.

Temperature

Guardalavaca's December reports an average high-temperature of a still moderately hot 27.2°C (81°F), exhibiting a minor difference from November. Recording a slight decline in temperature during the nights, Guardalavaca's December temperatures average at a still warm 23.8°C (74.8°F).

Heat index

The heat index value for December is computed to be a hot 30°C (86°F). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
One should consider that heat index numbers are for shaded settings and light wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

January, October through December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Guardalavaca, in December, it is raining for 16 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, there are 186.6 rainfall days, and 480mm (18.9") of precipitation is accumulated.

Sea temperature

In Guardalavaca, the average seawater temperature in December is 26°C (78.8°F).
Note: For activities in the water such as swimming or diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal for prolonged enjoyment without discomfort.

Daylight

December has the shortest days of the year, with an average of 10h and 54min of daylight.
On the first day of December, sunrise is at 06:24 and sunset at 17:20. On the last day of the month, sunrise is at 06:40 and sunset at 17:32 CST.

Sunshine

In December, the average sunshine is 6.4h.

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 reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 6 during December, leads to the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Caution! Sand and water surfaces escalate the UV intensity from the Sun.