May weather forecast
Saint John, VI

The last month of the spring, May, is another warm month in Saint John, United States Virgin Islands, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 73.4°F (23°C).

Temperature

In Saint John, the average high-temperature in May remains the same as in April - a still warm 84.2°F (29°C). In Saint John, the average low-temperature is 73.4°F (23°C).

Rainfall

In May, in Saint John, United States Virgin Islands, the rain falls for 12 days. Throughout May, 5.08" (129mm) of precipitation is 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, the average water temperature is 80.6°F (27°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In May, the average length of the day in Saint John 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

The average sunshine in May in Saint John, United States Virgin Islands, 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 estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 12 in May transform into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.