September weather forecast
Piarco, Trinidad and Tobago

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Weather in September

As the year starts winding down, Piarco's weather in September notes a slight decline in rainfall. This brings relief from the heavy rainfall experienced in August and hints towards a dry season. The highest and lowest temperatures for the month offer warm conditions amidst an overall cooling trend. Remarkably, the September daylight hours start to recede, subtly marking the beginning of the year's end. Overall, the Piarco weather in September is a pleasant blend of the wet and dry seasons.

Temperature

Piarco notes the warmest temperatures in September, with a high average of 30.1°C (86.2°F) and a low of 26.5°C (79.7°F).

Heat index

In September, the average heat index is appraised at a sweltering 37°C (98.6°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Piarco, during September, the rain falls for 19.9 days and regularly aggregates up to 78mm (3.07") of precipitation. In Piarco, during the entire year, the rain falls for 194.8 days and collects up to 640mm (25.2") of precipitation.

Daylight

The average length of the day in September in Piarco is 12h and 11min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:14. On the last day of September, sunrise is at 05:54 and sunset at 17:56 AST.

Sunshine

In Piarco, Trinidad and Tobago, the average sunshine in September is 11h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Shun overexposure. Protection from sun ravages is indispensable. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Resources | Updated: Feb 4, 2024 | Published by: Weather Atlas

Frequently asked questions

What is the hottest time of year in Piarco?

September brings the highest temperatures in Piarco, Trinidad and Tobago, with an average high of 30.1°C (86.2°F) and an average low of 26.5°C (79.7°F).

How hot is September in Piarco?

The average high-temperature, in September, in Piarco, is 30.1°C (86.2°F), while the average low-temperature is 26.5°C (79.7°F). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 37°C (98.6°F).

What is the average humidity in September in Piarco?

In Piarco, the average relative humidity in September is 77%.

How much does it rain in Piarco in September?

In Piarco, in September, it is raining for 19.9 days, with typically 78mm (3.07") of accumulated precipitation.

How many hours of daylight does Piarco have in September?

The average day length in September in Piarco is 12h and 11min.

When is the sunrise / sunset in September in Piarco?

On the first day of September, sunrise is at 05:55 and sunset at 18:14. On the last day of the month, sunrise is at 05:54 and sunset at 17:56 AST.

How long on average sun shines in September in Piarco?

The average sunshine duration in September is 11h.

What are the months with the highest UV index in Piarco?

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

What is the month with the lowest UV index in Piarco?

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

How high is the UV index in September in Piarco?

In Piarco, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.

Average temperature in September
Piarco, Trinidad and Tobago

Average temperature in September - Piarco, Trinidad and Tobago
  • Average high temperature in September: 30.1°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 September: 26.5°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 September
Piarco, Trinidad and Tobago

Average pressure in September - Piarco, Trinidad and Tobago
  • Average pressure in September: 1011.9mbar

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 September
Piarco, Trinidad and Tobago

Average wind speed in September - Piarco, Trinidad and Tobago
  • Average wind speed in September: 13.7km/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 September
Piarco, Trinidad and Tobago

Average humidity in September - Piarco, Trinidad and Tobago
  • Average humidity in September: 77%

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 September
Piarco, Trinidad and Tobago

Average rainfall in September - Piarco, Trinidad and Tobago
  • Average rainfall in September: 78mm

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 September
Piarco, Trinidad and Tobago

Average rainfall days in September - Piarco, Trinidad and Tobago
  • Average rainfall days in September: 19.9 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 September /
Average sunshine in September
Piarco, Trinidad and Tobago

Average daylight in September / Average sunshine in September - Piarco, Trinidad and Tobago
  • Average daylight in September: 12h and 1min

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 September: 11h and 0min

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 September
Piarco, Trinidad and Tobago

Average sunshine days in September - Piarco, Trinidad and Tobago
  • Average sunshine days in September: 7.4 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 September
Piarco, Trinidad and Tobago

Average UV index in September - Piarco, Trinidad and Tobago
  • Average UV index in September: 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 September
Piarco, Trinidad and Tobago

Average cloud cover in September - Piarco, Trinidad and Tobago
  • Average cloud cover in September: 27

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 September
Piarco, Trinidad and Tobago

Average visibility in September - Piarco, Trinidad and Tobago
  • Average visibility in September: 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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Piarco, Trinidad and Tobago

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