December weather forecast
Port of Spain, Trinidad and Tobago

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The ancient building hosting the public library of the Port of Spain in Trinidad and Tobago
The ancient building hosting the public library of the Port of Spain in Trinidad and Tobago

Weather in December

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.

Frequently asked questions

How hot does it get in Port of Spain in December?

December temperatures in Port of Spain, Trinidad and Tobago, vary between a high-temperature of 31.1°C (88°F) and a low-temperature of 21°C (69.8°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in December is computed to be 43°C (109.4°F).

What is the average humidity in December in Port of Spain?

In December, the average relative humidity in Port of Spain is 84%.

How much does it rain in Port of Spain in December?

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

What is the sea water temperature in December in Port of Spain?

In December, the average sea temperature is 27°C (80.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Port of Spain?

With an average of 11h and 30min of daylight, December has the shortest days of the year in Port of Spain.

What is the average length of the day in December in Port of Spain?

In December, the average day length is 11h and 31min.

When are sunrise and sunset in December in Port of Spain?

In December, on the first day of the month, sunrise is at 06:08 and sunset at 17:41. On the last day of the month, in Port of Spain, Trinidad and Tobago, sunrise is at 06:23 and sunset at 17:54 AST.

How long on average sun shines in December in Port of Spain?

In December, the average sunshine duration in Port of Spain, Trinidad and Tobago, is 6.9h.

When is the lowest UV index in Port of Spain?

The month with the lowest UV index in Port of Spain is December, with an average maximum UV index of 9.

How high is the UV index in December in Port of Spain?

The average daily maximum UV index in December is 9. A UV Index of 8 to 10 symbolizes a very high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Port of Spain, Trinidad and Tobago

Average temperature in December - Port of Spain, Trinidad and Tobago
  • Average high temperature in December: 31.1°C

The warmest month (with the highest average high temperature) is May (33.1°C).
The month with the lowest average high temperature is January (28°C).

  • Average low temperature in December: 21°C

The month with the highest average low temperature is June (23.3°C).
The coldest month (with the lowest average low temperature) is January (17°C).

Average humidity in December
Port of Spain, Trinidad and Tobago

Average humidity in December - Port of Spain, Trinidad and Tobago
  • Average humidity in December: 84%

The month with the highest relative humidity is November (86%).
The months with the lowest relative humidity are March and April (77%).

Average rainfall in December
Port of Spain, Trinidad and Tobago

Average rainfall in December - Port of Spain, Trinidad and Tobago
  • Average rainfall in December: 75.7mm

The wettest month (with the highest rainfall) is August (244mm).
The driest month (with the least rainfall) is March (16.9mm).

Average rainfall days in December
Port of Spain, Trinidad and Tobago

Average rainfall days in December - Port of Spain, Trinidad and Tobago
  • Average rainfall days in December: 13 days

The month with the highest number of rainy days is July (21 days).
The months with the least rainy days are March and April (6 days).

Average sea temperature in December
Port of Spain, Trinidad and Tobago

Average sea temperature in December - Port of Spain, Trinidad and Tobago
  • Average sea temperature in December: 27°C

The best month for swimming (with the highest average sea temperature) is September (29°C).
The coldest months (with the lowest average sea temperature) are February and March (26°C).

Average daylight in December /
Average sunshine in December
Port of Spain, Trinidad and Tobago

Average daylight in December / Average sunshine in December - Port of Spain, Trinidad and Tobago
  • Average daylight in December: 11h and 3min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is February (Average sunshine: 8h and 18min).
The month with the least sunshine is June (Average sunshine: 6h and 6min).

Average UV index in December
Port of Spain, Trinidad and Tobago

Average UV index in December - Port of Spain, Trinidad and Tobago
  • Average UV index in December: 9

The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 9).

Port of Spain, Trinidad and Tobago

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