August 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 August

The last month of the summer, August, is another warm month in Charlotte Amalie, United States Virgin Islands, with temperature in the range of an average low of 80.8°F (27.1°C) and an average high of 83.7°F (28.7°C).

Temperature

In Charlotte Amalie, the average high-temperature is relatively the same as in July - a still moderately hot 83.7°F (28.7°C). In Charlotte Amalie, the average low-temperature is 80.8°F (27.1°C).

Heat index

In August, the average heat index is evaluated at a hot 92.3°F (33.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, metabolic differences, wind, 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

May through August, with an average relative humidity of 78%, are most humid months in Charlotte Amalie, United States Virgin Islands.

Rainfall

In August, in Charlotte Amalie, the rain falls for 22.5 days. Throughout August, 4.21" (107mm) of precipitation is accumulated. Throughout the year, there are 253.1 rainfall days, and 33.27" (845mm) of precipitation is accumulated.

Ocean temperature

In Charlotte Amalie, the average seawater temperature is 84.4°F (29.1°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 in August is 12.7h.

Sunshine

In August, the average sunshine is 8.9h.

UV index

Months with the highest UV index are January through December, with an average maximum UV index of 7. Months with the lowest UV index in Charlotte Amalie, United States Virgin Islands, are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 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. 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 August in Charlotte Amalie?

In August, in Charlotte Amalie, the average high-temperature is 83.7°F (28.7°C), and the average low-temperature is 80.8°F (27.1°C). The average heat index (a.k.a. 'feels like', 'real feel'), that factores the actual air temperature with the relative humidity, in August is calculated to 92.3°F (33.5°C).

What are the most humid months in Charlotte Amalie?

May through August, with an average relative humidity of 78%, are most humid months in Charlotte Amalie, United States Virgin Islands.

What is the average humidity in August in Charlotte Amalie?

The average relative humidity in August in Charlotte Amalie is 78%.

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

In Charlotte Amalie, in August, it is raining for 22.5 days, with typically 4.21" (107mm) of accumulated precipitation.

What is the ocean temperature in August in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, the average seawater temperature in August is 84.4°F (29.1°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 August in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, the average length of the day in August is 12.7h.

How many hours of sunshine does Charlotte Amalie have in August?

In Charlotte Amalie, the average sunshine in August is 8.9h.

When is the highest UV index in Charlotte Amalie?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Charlotte Amalie.

When is the lowest UV index in Charlotte Amalie?

Months with the lowest UV index in Charlotte Amalie are January through December, with an average maximum UV index of 7.

What is the UV index reading in August in Charlotte Amalie?

In August, the average daily maximum UV index in Charlotte Amalie, United States Virgin Islands, is 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in August
Charlotte Amalie, VI

Average temperature in August - Charlotte Amalie, VI
  • Average high temperature in August: 83.7°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 August: 80.8°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 August
Charlotte Amalie, VI

Average pressure in August - Charlotte Amalie, VI
  • Average pressure in August: 29.97"

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 August
Charlotte Amalie, VI

Average wind speed in August - Charlotte Amalie, VI
  • Average wind speed in August: 14.4mph

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 August
Charlotte Amalie, VI

Average humidity in August - Charlotte Amalie, VI
  • Average humidity in August: 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 August
Charlotte Amalie, VI

Average rainfall in August - Charlotte Amalie, VI
  • Average rainfall in August: 4.21"

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 August
Charlotte Amalie, VI

Average rainfall days in August - Charlotte Amalie, VI
  • Average rainfall days in August: 22.5 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 August
Charlotte Amalie, VI

Average sea temperature in August - Charlotte Amalie, VI
  • Average sea temperature in August: 84.4°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 August /
Average sunshine in August
Charlotte Amalie, VI

Average daylight in August / Average sunshine in August - Charlotte Amalie, VI
  • Average daylight in August: 12.7h

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 August: 8.9h

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 August
Charlotte Amalie, VI

Average sunshine days in August - Charlotte Amalie, VI
  • Average sunshine days in August: 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 August
Charlotte Amalie, VI

Average UV index in August - Charlotte Amalie, VI
  • Average UV index in August: 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 August
Charlotte Amalie, VI

Average cloud cover in August - Charlotte Amalie, VI
  • Average cloud cover in August: 39

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 August
Charlotte Amalie, VI

Average visibility in August - Charlotte Amalie, VI
  • Average visibility in August: 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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