May weather forecast
Saint John, VI

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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 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

Saint John marks the arrival of May with an average high-temperature of a still moderately hot 84.2°F (29°C), identical to April. In the month of May, Saint John's average low-temperature falls to a still warm 73.4°F (23°C).

Rainfall

In May, the rain falls for 12 days. Throughout May, 5.08" (129mm) of precipitation is accumulated. Throughout the year, there are 156 rainfall days, and 49.69" (1262mm) of precipitation is accumulated.

Ocean temperature

In Saint John, the average seawater temperature in May is 80.6°F (27°C).
Note: Surface water temperatures falling between 77°F (25°C) and 84.2°F (29°C) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In May, the average length of the day 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 Saint John, the average sunshine in May 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 value of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 12 in May translates into the following recommendations:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Use liberally and reapply a broad-spectrum SPF 30+ sunscreen every two hours, or straight away after any outdoor workout or swim. Notice! The Sun's UV exposure elevates with sand and water reflections.

Frequently asked questions

How hot is May?

The average high-temperature, in May, in Saint John, is 84.2°F (29°C), while the average low-temperature is 73.4°F (23°C).

How many days does it rain in May?

In Saint John, United States Virgin Islands, during May, the rain falls for 12 days and regularly aggregates up to 5.08" (129mm) of precipitation.

What is the ocean temperature in May?

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

What time are sunrise and sunset in May?

In May, on the first day of the month, 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 many hours of sunshine does Saint John have in May?

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

What are the months with the highest UV index?

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

What is the UV index reading in May?

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

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").

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).

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).

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 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • 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).

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).

Saint John, United States Virgin Islands, USA

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