May weather forecast
Luquillo, PR

Luquillo's weather in May is characteristic of the tropical climate experienced in Puerto Rico. May is marked by a jump in the average temperature scale setting the stage for the imminent summer months. The sun shines longer as daylight hours increase to 13 hours. Interestingly, this month sees a significant rise in average rainfall to 1.69" (43mm), the first substantial increase since the start of the year. Despite the heat, frequent rains and moderate winds of 10.4mph (16.7km/h) make the weather enjoyable, typical of a tropical paradise.

Temperature

May's advent notes a subtle adjustment in average high-temperature to a still warm 81.5°F (27.5°C) from April. In Luquillo, the nocturnal temperatures throughout May show a marginal dip from the daytime averages, settling at a still moderately hot 78.4°F (25.8°C).

Heat index

In May, the heat index is estimated at a tropical 87.8°F (31°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

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

Rainfall

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

Daylight

The average length of the day in May is 13h and 0min.
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 5:45 am and sunset at 6:55 pm AST.

Sunshine

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

UV index

January, March through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in May transforms into the following instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. 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. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.