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

May experiences an average high-temperature of a still warm 83.1°F (28.4°C), barely different from April's 81.9°F (27.7°C). A modest decline from daytime high temperatures is noticed in May, marking the average low at a still warm 74.1°F (23.4°C).

Heat index

May's mean heat index is calculated to be a hot 91.4°F (33°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

In May, the average relative humidity in Arroyo is 80%.

Rainfall

In May, in Arroyo, the rain falls for 25.3 days. Throughout May, 2.95" (75mm) of precipitation is accumulated. In Arroyo, during the entire year, the rain falls for 255.3 days and collects up to 29.41" (747mm) of precipitation.

Ocean temperature

In Arroyo, the average seawater temperature in May is 82°F (27.8°C).
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In Arroyo, the average length of the day in May is 12h and 59min.
On the first day of May in Arroyo, 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 in Arroyo is 10.1h.

UV index

The months with the highest UV index are May through October, 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: In May, a daily maximum UV index of 7 leads to the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Attention! UV strength is notably upped by the reflection of sand and water.