May weather forecast
Saint John, VI

Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands
Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands

Weather in May

May, the last month of the spring in Saint John, is also a moderately hot month, with an average temperature varying between 84.2°F (29°C) and 73.4°F (23°C).

Temperature

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

Rainfall

In Saint John, during May, the rain falls for 12 days and regularly aggregates up to 5.08" (129mm) of precipitation. 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, the average water temperature is 80.6°F (27°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

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

Sunshine

In May, the average sunshine in Saint John is 8h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 12 translate into the following recommendations:
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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

How many days does it rain in May in Saint John?

In Saint John, United States Virgin Islands, in May, during 12 rainfall days, 5.08" (129mm) of precipitation is typically accumulated.

What is the ocean temperature in May in Saint John?

In Saint John, the average seawater temperature in May is 80.6°F (27°C). 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.

What is the average length of the day in May in Saint John?

In May, the average day length is 13h and 0min.

What time are sunrise and sunset in May in Saint John?

On the first day of May in Saint John, United States Virgin Islands, 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.

How long on average sun shines in May in Saint John?

In Saint John, United States Virgin Islands, the average sunshine duration in May is 8h.

When is the highest UV index in Saint John?

The months with the highest UV index in Saint John, United States Virgin Islands, are March through September, with an average maximum UV index of 12.

What is the UV index reading in May in Saint John?

In Saint John, the average daily maximum UV index in May is 12. A UV Index of 11, and more, symbolizes an extreme health threat from exposure to Sun's UV rays.
Average rainfall days
Average sunshine
Average UV index

Average temperature in May
Saint John, VI

Average temperature in May - Saint John, VI
  • Average high temperature in May: 84°F

The warmest months (with the highest average high temperature) are August and September (88°F).
The months with the lowest average high temperature are January, February, March and December (82°F).

  • Average low temperature in May: 73°F

The months with the highest average low temperature are June, July, August, September and October (75°F).
The coldest months (with the lowest average low temperature) are January, February and March (70°F).

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Average rainfall in May
Saint John, VI

Average rainfall in May - Saint John, VI
  • Average rainfall in May: 5.1"

The wettest months (with the highest rainfall) are October and November (6.3").
The driest month (with the least rainfall) is February (2.1").

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Average rainfall days in May
Saint John, VI

Average rainfall days in May - Saint John, VI
  • Average rainfall days in May: 12 days

The months with the highest number of rainy days are September and October (16 days).
The month with the least rainy days is April (9 days).

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Average sea temperature in May
Saint John, VI

Average sea temperature in May - Saint John, VI
  • Average sea temperature in May: 81°F

The best months for swimming (with the highest average sea temperature) are September and October (84°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (79°F).

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Average daylight in May /
Average sunshine in May
Saint John, VI

Average daylight in May / Average sunshine in May - Saint John, VI
  • Average daylight in May: 13h and 0min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 3min).

  • Average sunshine in May: 8h

The months with the most sunshine are March, April, July and August (Average sunshine: 9h).
The months with the least sunshine are November and December (Average sunshine: 7h).

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Average UV index in May
Saint John, VI

Average UV index in May - Saint John, VI
  • Average UV index in May: 12

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).

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