September weather forecast
Aguadilla, PR

September in Aguadilla signals a gradual transition from the sweltering summer towards the cooler autumn months. Despite the sea temperature peaking at 84.9°F (29.4°C), the overall climate implies a subtle cool-down is on the horizon. Rainfall continues its strong presence, recording an average of 3.9" (99mm), reminiscent of May's levels. The city continues to irrigate its landscapes, upholding the lush, vibrant panoramas. September's presiding conditions lay a testament to Aguadilla's tropical climate profile.

Temperature

Temperature readings reach their annual highs in September, averaging 84.9°F (29.4°C) and a minimum average of 79.7°F (26.5°C).

Heat index

September's mean heat index is calculated to be a torrid 95°F (35°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

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

Rainfall

September is the month with the most rainfall. Rain falls for 21.4 days and accumulates 3.9" (99mm) of precipitation.

Ocean temperature

The month with the warmest seawater is September, with an average ocean temperature of 84.9°F (29.4°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In Aguadilla, the average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 6:14 am and sunset at 6:42 pm. On the last day of September, sunrise is at 6:19 am and sunset at 6:17 pm AST.

Sunshine

In September, the average sunshine is 9.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Caution! The Sun's UV rays become stronger due to reflections from water and sand.