May weather forecast
Fajardo, PR

May brings with it the highest sea temperature of the year, a sizzling 81.6°F (27.6°C), making it the perfect time for a beach holiday in Fajardo. Alongside this, Fajardo steps up its sunlight game, offering approximately 13 hours of daylight, the highest so far. It's crucial to note that rainfall also witnesses a giant leap with a total precipitation of 1.69in spread across 19.8 days of the month. This increase in rainfall is counterbalanced by the warmth and sunshine the city generously offers. Hence, be it a dip in the sea or a ride into the city's history, Fajardo ensures a memorable time in the month of May.

Temperature

Fajardo, Puerto Rico, marks the onset of May with an average high-temperature of a still warm 81.5°F (27.5°C), subtly divergent from April's 80.4°F (26.9°C). Fajardo registers a gentle descent to an average nighttime low of 78.4°F (25.8°C) in May from its daytime highs.

Heat index

In May, the heat index is computed to be a tropical 87.8°F (31°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.

Humidity

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

Rainfall

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

Ocean temperature

In May, the average ocean temperature is 81.5°F (27.5°C).
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 77°F (25°C) to 84.2°F (29°C), without any unpleasant sensations for prolonged durations.

Daylight

In Fajardo, 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, in Fajardo, sunrise is at 5:45 am and sunset at 6:55 pm AST.

Sunshine

The average sunshine in May is 10.3h.

UV index

The months with the highest UV index in Fajardo, 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 threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during May leads to these advisories:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.