May weather forecast
Culebra, PR

May introduces significant changes to Culebra weather. The temperatures register an upward trend, paramount in announcing the onset of summer. A spike in humidity and rainfall to 3.03" (77mm) during May hints at the refreshingly wet season. Despite the increasing cloud cover, daylight also continues to increase, summing up to 13 hours. The island experiences brighter days as it transitions into the summer season.

Temperature

As April turns into May, the average high-temperatures rest at a still warm 81.1°F (27.3°C), showing a minor variation from the prior month. Throughout May, a modest shift from daytime highs is anticipated, with an average low-temperature of 77.7°F (25.4°C).

Heat index

The heat index for May is computed to be a hot 86°F (30°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.
Data suggests that the heat index is set for environments in shade and with a light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

The months with the highest humidity are May through August, with an average relative humidity of 78%.

Rainfall

In Culebra, in May, it is raining for 20.9 days, with typically 3.03" (77mm) of accumulated precipitation. In Culebra, during the entire year, the rain falls for 253.1 days and collects up to 33.27" (845mm) of precipitation.

Ocean temperature

In Culebra, the average seawater temperature in May is 81.9°F (27.7°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

The average length of the day in May is 13h and 0min.
On the first day of May, sunrise is at 5:53 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 6:53 pm AST.

Sunshine

In Culebra, the average sunshine in May is 10.3h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Culebra are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In May, the maximum UV index of 7 suggests these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! Reflections from sand and water can intensify the Sun's UV radiation.