December weather forecast
Port of Spain, Trinidad and Tobago

December sees a significant drop in rainfall as the region prepares to transition into the drier part of the year. From 211mm (8.31") in November, the recorded rainfall drops to 76mm (2.99") in December. The weather establishes a more congenial atmosphere for tourists and residents, featuring a cool breeze along with a blend of short showers and longer sunshine periods. The temperatures moderate, and the daylight hours begin to increase slightly, adding to the festive cheer in Port of Spain. The city shines yet again, offering a trove of activities ranging from eco-tours, beach parties, and wildlife expeditions to grand festive celebrations.

Temperature

During December, the average high-temperature in Port of Spain is a still hot 31.1°C (88°F), maintaining a close resemblance to that of the preceding month. Port of Spain's nighttime temperature in December falls to an average of 21°C (69.8°F).

Heat index

The heat index in December is computed to be a scorching 43°C (109.4°F). Notice: Heat cramps and heat exhaustion are likely. Continued strenuous activity might lead to heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in December in Port of Spain is 84%.

Rainfall

In Port of Spain, during December, the rain falls for 13 days and regularly aggregates up to 76mm (2.99") of precipitation. In Port of Spain, during the entire year, the rain falls for 166 days and collects up to 1408mm (55.43") of precipitation.

Sea temperature

In December, the average sea temperature in Port of Spain is 27°C (80.6°F).
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year in Port of Spain, Trinidad and Tobago.
On the first day of the month, sunrise is at 06:08 and sunset at 17:41. On the last day of December, sunrise is at 06:23 and sunset at 17:54 AST.

Sunshine

In December, the average sunshine in Port of Spain is 6.9h.

UV index

With an average maximum UV index of 9, December is the month with the lowest UV index. A UV Index of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 9 in December translates into the following instructions:
Protection is paramount; otherwise, swift harm can come to the skin and eyes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Caution! Sand and water reflections can notably increase the UV radiation intensity.