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

May is marked by an average high-temperature of a still warm 84.7°F (29.3°C), almost identical to the preceding month. Throughout May, Guánica anticipates an average low-temperature of 74.7°F (23.7°C).

Heat index

The heat index value for May is calculated to be a fiery hot 95°F (35°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In May, the average relative humidity is 77%.

Rainfall

In May, the rain falls for 21.6 days. Throughout May, 2.05" (52mm) of precipitation is accumulated. In Guánica, during the entire year, the rain falls for 224.9 days and collects up to 23.58" (599mm) of precipitation.

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: Water surface temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

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

UV index

The months with the highest UV index are April through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 in May translates into these instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Caution! The mirror effect of sand and water ups the UV radiation strength.