May weather forecast
Punta Santiago, PR

With the advent of May, fluctuations become more pronounced, indicating the onset of warmer months in Punta Santiago. A significant increase in rainfall becomes visually apparent. The longer days filled with increased sunshine introduce a higher uv-index rating of 7, imposing a higher risk of harm from unprotected sun exposure. Despite the higher temperatures, the relative humidity remains fairly constant providing a measure of relief. Notably, the rainfall increases to a whopping 3.5" (89mm) over the month—spread across nearly 26.3 rainy days—with the lowest temperature escalating to a warm 76.3°F (24.6°C).

Temperature

Punta Santiago records an average high-temperature of a still warm 82°F (27.8°C) in May, closely mirroring the climate of the previous month. In May, a low-temperature average of 76.3°F (24.6°C) is characteristic of Punta Santiago, marking a minor shift from daytime temperatures.

Heat index

During May, the heat index is estimated at a hot 89.6°F (32°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

May, July, August and November, with an average relative humidity of 80%, are the most humid months.

Rainfall

In May, the rain falls for 26.3 days. Throughout May, 3.5" (89mm) of precipitation is accumulated. In Punta Santiago, during the entire year, the rain falls for 268.8 days and collects up to 38.58" (980mm) of precipitation.

Ocean temperature

In May, the average ocean temperature is 81.5°F (27.5°C).
Note: Swimming, diving, and other water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are highly enjoyable and provide prolonged comfort without unease.

Daylight

The average length of the day in May is 12h and 59min.
On the first day of the month, sunrise is at 5:55 am and sunset at 6:44 pm. On the last day of May, sunrise is at 5:46 am and sunset at 6:55 pm AST.

Sunshine

The average sunshine in May is 10.2h.

UV index

April through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during May leads to these advisories:
Guard oneself from overexposure. Defence against sun injury is vital. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Alert! The Sun's UV rays are heightened by the reflection of sand and water.