August weather forecast
Frederiksted, VI

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A sunny bright and clear sky lights up the scenic park near Frederiksted port, in the US Virgin Islands
A sunny bright and clear sky lights up the scenic park near Frederiksted port, in the US Virgin Islands

Weather in August

In August, Frederiksted experiences the sweltering heat with the mercury soaring between 83.8°F (28.8°C) and 82°F (27.8°C). This month sees longer hours of daylight and persistent rainfall dispersed over 24.7 days, the highest in the year. Despite the temperature and rainfall, the daily sunbathing remains almost constant at 8.8 hours. The breezy conditions continue to offer comfort, making the weather tolerable for residents and tourists.

Temperature

The advent of August reveals an average high-temperature of a still warm 83.8°F (28.8°C), showing minimal difference from the prior month. Recording a slight decline in temperature during the nights, Frederiksted's August temperatures average at a still warm 82°F (27.8°C).

Heat index

August's heat index is calculated to be a tropical 93.2°F (34°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

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

Rainfall

August is the month with the most rainfall in Frederiksted. Rain falls for 24.7 days and accumulates 4.17" (106mm) of precipitation.

Daylight

In August, the average length of the day in Frederiksted is 12h and 43min.
On the first day of August, sunrise is at 5:58 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:33 pm AST.

Sunshine

In Frederiksted, United States Virgin Islands, the average sunshine in August is 8.8h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Frederiksted 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 exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 in August transforms into the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Updated: Feb 14, 2024 | Published by: Weather U.S. | About Us

Frequently asked questions

How hot does it get in Frederiksted in August?

Frederiksted in August has an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 82°F (27.8°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is calculated to be 93.2°F (34°C).

What is the most humid month in Frederiksted?

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

What is the average humidity in August in Frederiksted?

The average relative humidity in August in Frederiksted, United States Virgin Islands, is 78%.

What is the wettest month in Frederiksted?

August is the month with the most rainfall. Rain falls for 24.7 days and accumulates 4.17" (106mm) of precipitation.

How many days does it rain in August in Frederiksted?

In August, in Frederiksted, the rain falls for 24.7 days. Throughout August, 4.17" (106mm) of precipitation is accumulated.

What is the average length of the day in August in Frederiksted?

In Frederiksted, United States Virgin Islands, the average day length in August is 12h and 43min.

When are sunrise and sunset in August in Frederiksted?

On the first day of August in Frederiksted, sunrise is at 5:58 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 6:33 pm AST.

How long on average sun shines in August in Frederiksted?

In August, the average sunshine duration in Frederiksted is 8.8h.

When is the highest UV index in Frederiksted?

The 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 Frederiksted?

The months with the lowest UV index in Frederiksted, United States Virgin Islands, are January through December, with an average maximum UV index of 7.

What is the UV index reading in August in Frederiksted?

In Frederiksted, the average daily maximum UV index in August is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Frederiksted, VI

Average temperature in August - Frederiksted, VI
  • Average high temperature in August: 83.8°F

The warmest months (with the highest average high temperature) are September and October (84.2°F).
The month with the lowest average high temperature is March (78.8°F).

  • Average low temperature in August: 82°F

The month with the highest average low temperature is October (82.2°F).
The coldest month (with the lowest average low temperature) is March (76.6°F).

Average pressure in August
Frederiksted, VI

Average pressure in August - Frederiksted, VI
  • Average pressure in August: 29.96"Hg

The months with the highest atmospheric pressure are January, February and June (30.01"Hg).
The months with the lowest atmospheric pressure are October and November (29.9"Hg).

Average wind speed in August
Frederiksted, VI

Average wind speed in August - Frederiksted, VI
  • Average wind speed in August: 13.9mph

The windiest month (with the highest average wind speed) is July (14.7mph).
The calmest month (with the lowest average wind speed) is October (11mph).

Average humidity in August
Frederiksted, VI

Average humidity in August - Frederiksted, 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 and December (75%).

Average rainfall in August
Frederiksted, VI

Average rainfall in August - Frederiksted, VI
  • Average rainfall in August: 4.17"

The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in August
Frederiksted, VI

Average rainfall days in August - Frederiksted, VI
  • Average rainfall days in August: 24.7 days

The month with the highest number of rainy days is August (24.7 days).
The month with the least rainy days is February (16.7 days).

Average daylight in August /
Average sunshine in August
Frederiksted, VI

Average daylight in August / Average sunshine in August - Frederiksted, 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 month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in August
Frederiksted, VI

Average sunshine days in August - Frederiksted, VI
  • Average sunshine days in August: 1.8 days

The month with the most sunshine days is March (7.6 days).
The month with the least sunshine days is August (1.8 days).

Average UV index in August
Frederiksted, VI

Average UV index in August - Frederiksted, 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
Frederiksted, VI

Average cloud cover in August - Frederiksted, 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
Frederiksted, VI

Average visibility in August - Frederiksted, 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).

Frederiksted, United States Virgin Islands, USA

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