September weather forecast
Quebradillas, PR

In September, Quebradillas confronts a remarkable surge in the average high temperature, peaking at 84.9°F (29.4°C). With the coming of autumn, signs of the seasonal transition remain subtle. Glimpses of the looming wet season are evident in the increased rainfall measures. Despite the onset of milder weather, days remain bright and sunny. The calmness before the rainfall season puts on a picturesque show of natural beauty.

Temperature

September is Quebradillas's warmest month, registering average high temperatures of 84.9°F (29.4°C) and lows of 79°F (26.1°C).

Heat index

The heat index value during September is computed to be a very hot 96.8°F (36°C). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Quebradillas, the average relative humidity in September is 79%.

Rainfall

In Quebradillas, in September, it is raining for 21.7 days, with typically 5.16" (131mm) of accumulated precipitation. Throughout the year, there are 229.7 rainfall days, and 40" (1016mm) of precipitation is accumulated.

Daylight

In Quebradillas, the average length of the day in September is 12h and 14min.
On the first day of September, sunrise is at 6:13 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 6:16 pm AST.

Sunshine

In September, the average sunshine is 9.2h.

UV index

March through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.