May weather forecast
Saint John, VI

May brings a subtle warm up to the Virgin Islands' Saint John. The gentle rise in temperature when paired with sea breezes makes May weather a delightful experience for beach goers and sightseers. Despite it being a warm month, the significant weather change is, May receives the heaviest rainfall so far in the year, at 5.1" (130mm). This mix of balmy temperatures and periodic showers creates an appealing tropical atmosphere.

Temperature

May in Saint John, United States Virgin Islands, is marked by an average high-temperature of a still moderately hot 84.2°F (29°C), maintaining the same climate as April. During the nights in May, Saint John experiences a consistent average temperature of 73.4°F (23°C).

Rainfall

In Saint John, in May, during 12 rainfall days, 5.08" (129mm) of precipitation is typically accumulated. In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.69" (1262mm) of precipitation.

Ocean temperature

In Saint John, United States Virgin Islands, in May, the average water temperature is 80.6°F (27°C).
Note: For water activities like swimming, diving, and more, temperatures ranging between 77°F (25°C) and 84.2°F (29°C) offer superior comfort and enjoyment for lengthy durations.

Daylight

The average length of the day in May is 13h and 0min.
On the first day of May, sunrise is at 5:51 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 6:51 pm AST.

Sunshine

In May, the average sunshine is 8h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Saint John. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 12 during May translates into the following directions:
Put into action all crucial precautions. Defense against sun damage is a must. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. One should apply and reapply liberally a broad-spectrum sunscreen of SPF 30+ every two hours and immediately after a swim or an outdoor exercise. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.