Charlotte Amalie
United States Virgin Islands, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Charlotte Amalie, VI

An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands
An aerial night view of the Charlotte Amalie Harbour within the United States Virgin Islands
The last month of the summer, August, is another warm month in Charlotte Amalie, United States Virgin Islands, with average temperature varying between 83.7°F (28.7°C) and 80.8°F (27.1°C).

Temperature

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

Heat index

The average heat index in August is evaluated at a hot 92.3°F (33.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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', 'felt air temperature', 'feels like', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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 in Charlotte Amalie are May through August, with an average relative humidity of 78%.

Rainfall

In Charlotte Amalie, during August, the rain falls for 22.5 days and regularly aggregates up to 4.21" (107mm) of precipitation. 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 in August is 84.4°F (29.1°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 August, the average length of the day in Charlotte Amalie is 12.7h.

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. Months with the lowest UV index in Charlotte Amalie are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

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. 'real feel', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, in August is evaluated at 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.

What is the average humidity in August in Charlotte Amalie?

The average relative humidity in August is 78%.

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

In Charlotte Amalie, United States Virgin Islands, in August, during 22.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated.

How warm is the water in August in Charlotte Amalie?

In August, the average ocean temperature in Charlotte Amalie, United States Virgin Islands, is 84.4°F (29.1°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in August in Charlotte Amalie?

The average length of the day in August in Charlotte Amalie is 12.7h.

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

In Charlotte Amalie, United States Virgin Islands, 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.

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.

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

The average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.
Average temperature in August - Charlotte Amalie, VI
  • Average high temperature in August: 28.7°C

The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is March (25.8°C).

  • Average low temperature in August: 27.1°C

The month with the highest average low temperature is October (27.5°C).
The coldest month (with the lowest average low temperature) is March (24.3°C).

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%).

Average rainfall in August - Charlotte Amalie, VI
  • Average rainfall in August: 107mm

The wettest month (with the highest rainfall) is September (113mm).
The driest month (with the lowest rainfall) is February (31mm).

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 lowest number of rainy days are February, March and June (18.2 days).

Average sea temperature in August - Charlotte Amalie, VI
  • Average sea temperature in August: 29.1°C

The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is February (25.9°C).

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 shortest days is December (Average daylight: 11h).

  • Average sunshine in August: 8.9h

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

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).