April weather forecast
Arroyo, PR

April weather in Arroyo, Puerto Rico, indicates a noticeable climb in the heat index and a rise in humidity. It also brings with it an escalation in rainfall amounts to 1.93" (49mm), signaling the onset of the wet season. The month typically sees a mix of sunny and cloudy days. Despite relatively higher temperature levels, the wind speed remains steady, ensuring a reasonably comfortable environment. The prolonged daylight duration during April delivers more time to enjoy the tropical character of the region.

Temperature

As April unfolds, the average high-temperature reaches a still moderately hot 81.9°F (27.7°C), hinting at a slight fluctuation from the previous month. Arroyo, during the April nights, maintains an average temperature of 73°F (22.8°C), closely aligned with its daytime readings.

Heat index

During April, the heat index is evaluated at a hot 87.8°F (31°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

In April, the average relative humidity is 78%.

Rainfall

In April, the rain falls for 21.2 days. Throughout April, 1.93" (49mm) of precipitation is accumulated. Throughout the year, there are 255.3 rainfall days, and 29.41" (747mm) of precipitation is accumulated.

Ocean temperature

In April, the average ocean temperature is 81°F (27.2°C).
Note: For swimming, diving, and enjoying other water activities, the range of 77°F (25°C) to 84.2°F (29°C) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

In Arroyo, the average length of the day in April is 12h and 34min.
On the first day of the month, sunrise is at 6:17 am and sunset at 6:37 pm. On the last day of April, sunrise is at 5:57 am and sunset at 6:45 pm AST.

Sunshine

In Arroyo, the average sunshine in April is 8.7h.

UV index

The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 6. 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 6 during April leads to these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. Be attentive! The UV exposure is heightened with reflections from sand and water.