December weather forecast
San Fernando, Trinidad and Tobago

The year in San Fernando wraps up, fittingly, with the coolest month. December beckons the arrival of peak tourist season, thanks to the drier weather and significantly lower temperatures. The climatic parameters echo the city's festive spirit with comfortable days and cooler evenings. The recorded highest and lowest temperatures range from 28.7°C (83.7°F) to 25.4°C (77.7°F). The city experiences rainfall on 16.6 days, amounting to 48mm (1.89"), thus bringing a close to the year on a drier note.

Temperature

December's weather records an average high-temperature of a still moderately hot 28.7°C (83.7°F), showing little deviation from November. San Fernando maintains an average of approximately a still warm 25.4°C (77.7°F) during December nights, with only a minimal decrease from the daytime temperature.

Heat index

The heat index value during December is appraised at a hot 34°C (93.2°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

The months with the highest humidity in San Fernando are July, November and December, with an average relative humidity of 78%.

Rainfall

In San Fernando, during December, the rain falls for 16.6 days and regularly aggregates up to 48mm (1.89") of precipitation. In San Fernando, during the entire year, the rain falls for 202.6 days and collects up to 599mm (23.58") of precipitation.

Sea temperature

In San Fernando, the average seawater temperature in December is 27.8°C (82°F).
Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year in San Fernando, Trinidad and Tobago.
On the first day of the month, sunrise is at 06:08 and sunset at 17:42. On the last day of December, sunrise is at 06:23 and sunset at 17:55 AST.

Sunshine

The month with the least sunshine in San Fernando is December, with an average of 6.7h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in San Fernando. The months with the lowest UV index in San Fernando are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the UV index of 7 transforms into the following advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Heed this! UV intensity is much stronger when reflected off sand and water.