December weather forecast
Arima, Trinidad and Tobago

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Weather in December

With the year-end, a mild decrease in temperature takes place in December while the humid, rainy weather of November carries forward. The town of Arima sees a drop in daylight hours, coaxing the evenings to arrive a bit sooner than before. However, sufficient sunshine persists due to the receding cloud cover. Wind speeds elevate slightly adding a bit of chill to the ambient warmth. The monthly rainfall subsides to 44mm (1.73") over 18.3 days, signifying a descending trend towards the drier start of the new year.

Temperature

The start of December in Arima marks an average high-temperature of a still warm 28.5°C (83.3°F), hardly distinguishable from the conditions in November. Arima marks an average drop to a still moderately hot 25.5°C (77.9°F) during nighttime in December, following the high of the day.

Heat index

The heat index value for December is calculated to be a hot 33°C (91.4°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

In Arima, the average relative humidity in December is 78%.

Rainfall

In Arima, Trinidad and Tobago, in December, during 18.3 rainfall days, 44mm (1.73") of precipitation is typically accumulated. Throughout the year, in Arima, there are 194.8 rainfall days, and 640mm (25.2") of precipitation is accumulated.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year.
On the first day of December in Arima, sunrise is at 06:07 and sunset at 17:40. On the last day of the month, sunrise is at 06:22 and sunset at 17:53 AST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year in Arima.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Arima. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Arima, Trinidad and Tobago. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 7 during December translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

How hot is December in Arima?

During December, Arima experiences an average high-temperature of 28.5°C (83.3°F) and a low-temperature of 25.5°C (77.9°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in December is calculated to be 33°C (91.4°F).

What is the average humidity in December in Arima?

In Arima, Trinidad and Tobago, the average relative humidity in December is 78%.

How much does it rain in Arima in December?

In Arima, Trinidad and Tobago, in December, during 18.3 rainfall days, 44mm (1.73") of precipitation is typically accumulated.

What is the month with the shortest days in Arima?

December has the shortest days of the year in Arima, with an average of 11h and 30min of daylight.

What is the average length of the day in December in Arima?

The average day length in December in Arima is 11h and 31min.

When is the sunrise / sunset in December in Arima?

In December, on the first day of the month, sunrise is at 06:07 and sunset at 17:40. On the last day of the month, sunrise is at 06:22 and sunset at 17:53 AST.

What is the month with the least sunshine in Arima?

With an average of 6.7h of sunshine, December has the least sunshine of the year in Arima.

How long on average sun shines in December in Arima?

The average sunshine duration in December in Arima is 6.7h.

What is the month with the highest UV index in Arima?

The months with the highest UV index in Arima, Trinidad and Tobago, are January through December, with an average maximum UV index of 7.

What are the months with the lowest UV index in Arima?

The months with the lowest UV index in Arima, Trinidad and Tobago, are January through December, with an average maximum UV index of 7.

What is the UV index intensity in December in Arima?

The average daily maximum UV index in December in Arima is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.

Average temperature in December
Arima, Trinidad and Tobago

Average temperature in December - Arima, Trinidad and Tobago
  • Average high temperature in December: 28.5°C

The warmest month (with the highest average high temperature) is September (30.1°C).
The month with the lowest average high temperature is January (27.9°C).

  • Average low temperature in December: 25.5°C

The month with the highest average low temperature is October (26.6°C).
The coldest months (with the lowest average low temperature) are January and February (24.8°C).

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Average pressure in December
Arima, Trinidad and Tobago

Average pressure in December - Arima, Trinidad and Tobago
  • Average pressure in December: 1012.3mbar

The month with the highest atmospheric pressure is June (1013.8mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).

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Average wind speed in December
Arima, Trinidad and Tobago

Average wind speed in December - Arima, Trinidad and Tobago
  • Average wind speed in December: 17.1km/h

The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is August (13.6km/h).

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Average humidity in December
Arima, Trinidad and Tobago

Average humidity in December - Arima, Trinidad and Tobago
  • Average humidity in December: 78%

The month with the highest relative humidity is July (79%).
The months with the lowest relative humidity are February, March and April (75%).

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Average rainfall in December
Arima, Trinidad and Tobago

Average rainfall in December - Arima, Trinidad and Tobago
  • Average rainfall in December: 44mm

The wettest month (with the highest rainfall) is October (115mm).
The driest month (with the least rainfall) is February (14mm).

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Average rainfall days in December
Arima, Trinidad and Tobago

Average rainfall days in December - Arima, Trinidad and Tobago
  • Average rainfall days in December: 18.3 days

The month with the highest number of rainy days is August (22.2 days).
The months with the least rainy days are February and April (10.3 days).

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Average daylight in December /
Average sunshine in December
Arima, Trinidad and Tobago

Average daylight in December / Average sunshine in December - Arima, 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 4min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in December
Arima, Trinidad and Tobago

Average sunshine days in December - Arima, Trinidad and Tobago
  • Average sunshine days in December: 8.7 days

The months with the most sunshine days are March and April (15.9 days).
The month with the least sunshine days is August (6.8 days).

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Average UV index in December
Arima, Trinidad and Tobago

Average UV index in December - Arima, Trinidad and Tobago
  • Average UV index in December: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in December
Arima, Trinidad and Tobago

Average cloud cover in December - Arima, Trinidad and Tobago
  • Average cloud cover in December: 38

The month with the most cloud cover is June (Cloud cover 40).
The month with the least cloud cover is September (Cloud cover 27).

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Average visibility in December
Arima, Trinidad and Tobago

Average visibility in December - Arima, Trinidad and Tobago
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Arima, Trinidad and Tobago

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