May weather forecast
Arroyo, PR

May marks the commencement of the hot season in Arroyo, with temperatures, humidity, and rainfall at 2.95" (75mm) all reaching the highest levels yet experienced during the year. Despite these enhanced figures, the city remains joyfully vibrant under the sunny skyline. Cloud cover increases slightly, offsetting some of the heat from the burgeoning sunshine hours. The wind speede remains consistent, helping to ease the warmer conditions. While the rising humidity may demand some adaptation, May still delivers attractive conditions for experiencing the vibrant city life in Arroyo.

Temperature

An average high-temperature of a still warm 83.1°F (28.4°C) marks May, exhibiting a close resemblance to the conditions in April. May nights in Arroyo witness a mild cool down to an average low of 74.1°F (23.4°C).

Heat index

The heat index for May is evaluated at a tropical 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.

Humidity

The average relative humidity in May is 80%.

Rainfall

In Arroyo, during May, the rain falls for 25.3 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 255.3 rainfall days, and 29.41" (747mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature is 82°F (27.8°C).
Note: For swimming, diving, and similar activities, the water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

In Arroyo, the average length of the day in May is 12h and 59min.
On the first day of May, sunrise is at 5:57 am and sunset at 6:45 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 6:56 pm AST.

Sunshine

The average sunshine in May is 10.1h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 7 in May translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.