May weather forecast and climate
Charlotte Amalie, VI

The Charlotte Amalie Harbour within the United States Virgin Islands
The Charlotte Amalie Harbour within the United States Virgin Islands

Weather in May

May, the last month of the spring, in Charlotte Amalie, is also a moderately hot month, with temperature in the range of an average low of 77.7°F (25.4°C) and an average high of 81.1°F (27.3°C).

Temperature

In May, the average high-temperature is practically the same as in April - a still warm 81.1°F (27.3°C). In Charlotte Amalie, in May, the average low-temperature is 77.7°F (25.4°C).

Heat index

The average heat index in May is estimated at a tropical 86.4°F (30.2°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like activity, wind, metabolic differences, and pregnancy affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

Months with the highest humidity are May through August, with an average relative humidity of 78%.

Rainfall

In May, in Charlotte Amalie, the rain falls for 20.9 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. In Charlotte Amalie, during the entire year, the rain falls for 253.1 days and collects up to 33.27" (845mm) of precipitation.

Ocean temperature

In Charlotte Amalie, the average seawater temperature is 81.5°F (27.5°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Charlotte Amalie, the average length of the day is 13h.

Sunshine

The average sunshine in Charlotte Amalie, United States Virgin Islands, is 10.3h.

UV index

Months with the highest UV index in Charlotte Amalie are January through December, with an average maximum UV index of 7. Months with the lowest UV index in Charlotte Amalie are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in May transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in May in Charlotte Amalie?

In Charlotte Amalie, in May, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 77.7°F (25.4°C). In May, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, is calculated to 86.4°F (30.2°C).

What are the most humid months in Charlotte Amalie?

May through August, with an average relative humidity of 78%, are most humid months.

What is the average humidity in May in Charlotte Amalie?

The average relative humidity in May in Charlotte Amalie, United States Virgin Islands, is 78%.

How many days does it rain in May in Charlotte Amalie?

In Charlotte Amalie, in May, it is raining for 20.9 days, with typically 3.03" (77mm) of accumulated precipitation.

What is the water temperature in May in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, in May, the average water temperature is 81.5°F (27.5°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.

How many hours of daylight does Charlotte Amalie have in May?

The average length of the day in May in Charlotte Amalie, United States Virgin Islands, is 13h.

How long on average sun shines in May in Charlotte Amalie?

In May, the average sunshine is 10.3h.

When is the highest UV index in Charlotte Amalie?

Months with the highest UV index are January through December, with an average maximum UV index of 7.

When is the lowest UV index in Charlotte Amalie?

January through December, with an average maximum UV index of 7, are months with the lowest UV index.

How high is the UV index in May in Charlotte Amalie?

The average daily maximum UV index in May is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in May
Charlotte Amalie, VI

Average temperature in May - Charlotte Amalie, VI
  • Average high temperature in May: 81.1°F

The warmest month (with the highest average high temperature) is September (84°F).
The month with the lowest average high temperature is March (78.4°F).

  • Average low temperature in May: 77.7°F

The month with the highest average low temperature is October (81.5°F).
The coldest month (with the lowest average low temperature) is March (75.7°F).

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Average pressure in May
Charlotte Amalie, VI

Average pressure in May - Charlotte Amalie, VI
  • Average pressure in May: 29.99"

Months with the highest atmospheric pressure are January and February (30.02").
Months with the lowest atmospheric pressure are October and November (29.91").

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Average wind speed in May
Charlotte Amalie, VI

Average wind speed in May - Charlotte Amalie, VI
  • Average wind speed in May: 13.1mph

The windiest month (with the highest average wind speed) is July (15mph).
The calmest month (with the lowest average wind speed) is October (11.1mph).

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Average humidity in May
Charlotte Amalie, VI

Average humidity in May - Charlotte Amalie, VI
  • Average humidity in May: 78%

Months with the highest relative humidity are May, June, July and August (78%).
Months with the lowest relative humidity are January, February, March, October, November and December (75%).

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Average rainfall in May
Charlotte Amalie, VI

Average rainfall in May - Charlotte Amalie, VI
  • Average rainfall in May: 3.03"

The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in May
Charlotte Amalie, VI

Average rainfall days in May - Charlotte Amalie, VI
  • Average rainfall days in May: 20.9 days

The month with the highest number of rainy days is November (25.5 days).
Months with the least rainy days are February, March and June (18.2 days).

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Average sea temperature in May
Charlotte Amalie, VI

Average sea temperature in May - Charlotte Amalie, VI
  • Average sea temperature in May: 81.5°F

The best month for swimming (with the highest average sea temperature) is September (85°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).

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Average daylight in May /
Average sunshine in May
Charlotte Amalie, VI

Average daylight in May / Average sunshine in May - Charlotte Amalie, VI
  • Average daylight in May: 13h

The month with the longest days is June (Average daylight: 13.2h).
The month with the shortest days is December (Average daylight: 11h).

  • Average sunshine in May: 10.3h

The month with the most sunshine is June (Average sunshine: 10.5h).
Months with the least sunshine are November and December (Average sunshine: 6.5).

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Average sunshine days in May
Charlotte Amalie, VI

Average sunshine days in May - Charlotte Amalie, VI
  • Average sunshine days in May: 5.4 days

Months with the most sunshine days are March and April (7.3 days).
The month with the least sunshine days is November (2.4 days).

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Average UV index in May
Charlotte Amalie, VI

Average UV index in May - Charlotte Amalie, VI
  • Average UV index in May: 7

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in May
Charlotte Amalie, VI

Average cloud cover in May - Charlotte Amalie, VI
  • Average cloud cover in May: 40

Months with the most cloud cover are May and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 33).

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Average visibility in May
Charlotte Amalie, VI

Average visibility in May - Charlotte Amalie, VI
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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