May weather forecast
Vieques, PR

May is characterized by a more pronounced shift into the rainy season in Vieques. There is a marked rise in both rainfall and humidity making the weather take on steamy tropical characteristics. Nevertheless, daylight is at its longest with 13 hours. Puffs of cloud float often across the sky, adding shade to the heightened sunshine. Still, the sea remains invitingly warm satisfying the desires for beach activities.

Temperature

With the onset of May, the average high-temperature in Vieques stands at a still moderately hot 81.5°F (27.5°C), closely aligned with April's 80.4°F (26.9°C). Vieques reports an average low temperature of 78.4°F (25.8°C) in May, a minor decrease from the day's highs.

Heat index

May's heat index is appraised at a hot 87.8°F (31°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

May through August, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Vieques, during May, the rain falls for 19.8 days and regularly aggregates up to 1.69" (43mm) of precipitation. In Vieques, during the entire year, the rain falls for 216 days and collects up to 21.5" (546mm) of precipitation.

Ocean temperature

In Vieques, the average seawater temperature in May is 81.5°F (27.5°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in May in Vieques, Puerto Rico, is 12h and 59min.
On the first day of May in Vieques, sunrise is at 5:54 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

The average sunshine in May in Vieques, Puerto Rico, is 10.3h.

UV index

The months with the highest UV index in Vieques, Puerto Rico, are January, March through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Beware! Reflections from sand and water can intensify the Sun's UV radiation.