September weather forecast
Penal, Trinidad and Tobago

In Penal, the month of September indicates the gradual decrease of rain. The average high temperature hits its peak at 30.5°C (86.9°F) while evenings are a bit cooler at 26.5°C (79.7°F). Rainfall recedes to a lower average of 82mm (3.23"), hinting at the approaching end of the wet season. As the month progresses, citizens look forward to fewer rainy days and more sunshine. The easing off of rains towards the end of the month provides a sense of respite and indicates the imminent arrival of the dry season.

Temperature

Penal's September weather, with an average high temperature of 30.5°C (86.9°F) and an average low temperature of 26.5°C (79.7°F), tends to be the warmest of the year.

Heat index

The heat index for September is estimated at a very hot 38°C (100.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Penal, the average relative humidity in September is 76%.

Rainfall

In Penal, in September, it is raining for 18.8 days, with typically 61mm (2.4") of accumulated precipitation. In Penal, Trinidad and Tobago, during the entire year, the rain falls for 202.6 days and collects up to 599mm (23.58") of precipitation.

Daylight

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

Sunshine

August and September, with an average of 11.1h of sunshine, are months with the most sunshine in Penal, Trinidad and Tobago.

UV index

The months with the highest UV index in Penal are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during September translates into the following guidance:
Deflect overexposure. Sun protection is a necessity. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.