August weather forecast
Charlotte Amalie, VI

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

Weather in August

August in Charlotte Amalie offers consistently warm weather reminiscent of the slowed pace of the dog days of summer. This month records the highest rainfall, reaching up to 4.21" (107mm). Steady sea temperatures offer an enjoyable respite from the tropical summer heat. The city, conditioned for such weather patterns, welcomes visitors with an array of indoor and outdoor activities. The overall climate in August does not deviate much, pointing to the weather stability intrinsic to this Caribbean location.

Temperature

The shift into August in Charlotte Amalie reveals an average high-temperature of a still moderately hot 83.7°F (28.7°C), closely mirroring July's climate. Charlotte Amalie in August experiences a minor decline in temperature, with an average low of 80.8°F (27.1°C) at night.

Heat index

Throughout August, the heat index is appraised at a hot 93.2°F (34°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

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

Rainfall

In Charlotte Amalie, in August, during 22.5 rainfall days, 4.21" (107mm) of precipitation is typically 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 August, the average ocean temperature is 84.4°F (29.1°C).
Note: In any water activity, temperatures between 77°F (25°C) and 84.2°F (29°C) are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.

Daylight

In August, the average length of the day in Charlotte Amalie is 12h and 44min.
On the first day of August in Charlotte Amalie, sunrise is at 5:57 am and sunset at 6:54 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:34 pm AST.

Sunshine

The average sunshine in August is 8.9h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Charlotte Amalie, United States Virgin Islands. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 in August translates into this advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take caution! The UV rays from the Sun gain strength from sand and water reflections.

Frequently asked questions

How hot is August in Charlotte Amalie?

The average high-temperature, in August, in Charlotte Amalie, is 83.7°F (28.7°C), while the average low-temperature is 80.8°F (27.1°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is appraised at 93.2°F (34°C).

What is the most humid month in Charlotte Amalie?

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

What is the average humidity in August in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, the average relative humidity in August is 78%.

How much does it rain in Charlotte Amalie in August?

In August, in Charlotte Amalie, United States Virgin Islands, the rain falls for 22.5 days. Throughout August, 4.21" (107mm) of precipitation is accumulated.

How warm is the water in August in Charlotte Amalie?

In Charlotte Amalie, United States Virgin Islands, in August, the average water temperature 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, the average day length in August is 12h and 44min.

When is the sunrise / sunset in August in Charlotte Amalie?

On the first day of August, sunrise is at 5:57 am and sunset at 6:54 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:34 pm AST.

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

The average sunshine duration in August in Charlotte Amalie, United States Virgin Islands, is 8.9h.

What is the month with 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?

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

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

In August, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to 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).

Average pressure in August
Charlotte Amalie, VI

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

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

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).

Average humidity in August
Charlotte Amalie, VI

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

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

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").

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).
The months with the least rainy days are February, March and June (18.2 days).

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).

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: 12h and 4min

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 August: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

Average sunshine days in August
Charlotte Amalie, VI

Average sunshine days in August - Charlotte Amalie, VI
  • Average sunshine days in August: 4 days

The 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).

Average UV index in August
Charlotte Amalie, VI

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

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

Average cloud cover in August
Charlotte Amalie, VI

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

The 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).

Average visibility in August
Charlotte Amalie, VI

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

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

Charlotte Amalie, United States Virgin Islands, USA

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