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

As Punta Santiago, Puerto Rico, welcomes May, the average high-temperature stabilizes at a still warm 82°F (27.8°C), showing little deviation from April's 81°F (27.2°C). A modest dip in temperatures to an average of 76.3°F (24.6°C) is observed throughout Punta Santiago's May nights.

Heat index

May's mean heat index is estimated at a hot 89.6°F (32°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.

Humidity

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

Rainfall

In Punta Santiago, Puerto Rico, in May, it is raining for 26.3 days, with typically 3.5" (89mm) of accumulated precipitation. 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 Punta Santiago, in May, the average water temperature is 81.5°F (27.5°C).
Note: Surface water temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are considered superb and highly pleasant for water activities over extended periods.

Daylight

In May, the average length of the day 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 in Punta Santiago. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Take caution! The UV rays from the Sun gain strength from sand and water reflections.