May weather forecast
Guánica, PR

As the gateway to the wet season, May sees a substantial increase in rainfall frequency compared to the previous months. This uptick in rainfall days makes it the wettest month so far in the year, turning Guánica into a lush tropical paradise. Along with the rain, temperatures tend to rise, making midday outdoor excursions slightly challenging. Still, the evenings and mornings remain cool and beautiful for sightseeing, thanks to an increase in the hours of daylight. On the coast, warmer seawater becomes more welcoming for swimmers and water sports enthusiasts.

Temperature

Guánica, Puerto Rico, experiences an average high-temperature of a still moderately hot 84.7°F (29.3°C) with the onset of May, subtly varied from April's 83.7°F (28.7°C). An average low-temperature of 74.7°F (23.7°C) marks the nights throughout May.

Heat index

May's average heat index is evaluated at a fiery hot 95°F (35°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Guánica, Puerto Rico, the average relative humidity in May is 77%.

Rainfall

In Guánica, in May, during 21.6 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 224.9 rainfall days, and 23.58" (599mm) of precipitation is accumulated.

Snowfall

January through August, October through December are months without snowfall.

Ocean temperature

In May, the average ocean temperature is 81.5°F (27.5°C).
Note: For any water activity, temperatures between 77°F (25°C) and 84.2°F (29°C) are deemed excellent and extremely satisfying for enduring periods.

Daylight

The average length of the day in May is 12h and 59min.
On the first day of the month, sunrise is at 6:00 am and sunset at 6:48 pm. On the last day of May, sunrise is at 5:51 am and sunset at 6:59 pm AST.

Sunshine

In May, the average sunshine in Guánica is 10.7h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index in Guánica. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Notice! The reflection of water and sand increases the UV radiation significantly.