August weather forecast
Port-au-Prince, Haiti

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A stack of structures on a hillside in Port-au-Prince, Haiti
A stack of structures on a hillside in Port-au-Prince, Haiti

Weather in August

August witnesses a further rise in rainfall in Port-au-Prince, reaching 111mm (4.37"), making it one of the rainiest months of the year. However, despite the increased rainfall, the maximum temperature holds steady at 30.9°C (87.6°F), tying with July for the highest temperature of the year. During this time, the sea temperature reaches its highest point at 29.5°C (85.1°F), offering the perfect conditions for water sports. The city also enjoys 12.7 hours of daylight that showcases the beauty of this Caribbean gem. This period still allows for 6 days of clear skies, offering an excellent opportunity for sunbathers.

Temperature

August, noted for its average high-temperature of 30.9°C (87.6°F) and an average low-temperature of 21.3°C (70.3°F), is considered the warmest month in Port-au-Prince, Haiti.

Heat index

During August, the heat index is estimated at a torrid 39°C (102.2°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in August is 74%.

Rainfall

In Port-au-Prince, in August, it is raining for 22.2 days, with typically 111mm (4.37") of accumulated precipitation. In Port-au-Prince, during the entire year, the rain falls for 227.4 days and collects up to 904mm (35.59") of precipitation.

Sea temperature

In Port-au-Prince, the average seawater temperature in August is 29.5°C (85.1°F).
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

The average length of the day in August in Port-au-Prince, Haiti, is 12h and 44min.
On the first day of August, sunrise is at 06:27 and sunset at 19:24. On the last day of the month, sunrise is at 06:34 and sunset at 19:04 EDT.

Sunshine

In Port-au-Prince, the average sunshine in August is 11.2h.

UV index

The months with the lowest UV index in Port-au-Prince are January through May, July through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 6 in August translates into these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Notice! The reflection of water and sand increases the UV radiation significantly.

Frequently asked questions

What month is the hottest in Port-au-Prince?

August, with its average high-temperature of 30.9°C (87.6°F) and an average low-temperature of 21.3°C (70.3°F), holds the record as the warmest month in Port-au-Prince.

How hot is it in Port-au-Prince in August?

The average high-temperature and low-temperature in Port-au-Prince, Haiti, during August are 30.9°C (87.6°F) and 21.3°C (70.3°F) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in August is estimated at 39°C (102.2°F).

What is the average humidity in August in Port-au-Prince?

The average relative humidity in August in Port-au-Prince, Haiti, is 74%.

How many days does it rain in August in Port-au-Prince?

In Port-au-Prince, during August, the rain falls for 22.2 days and regularly aggregates up to 111mm (4.37") of precipitation.

What is the water temperature in August in Port-au-Prince?

In August, the average sea temperature is 29.5°C (85.1°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) 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 Port-au-Prince?

The average day length in August in Port-au-Prince is 12h and 44min.

When are sunrise and sunset in August in Port-au-Prince?

On the first day of August, sunrise is at 06:27 and sunset at 19:24. On the last day of the month, sunrise is at 06:34 and sunset at 19:04 EDT.

How many hours of sunshine does Port-au-Prince have in August?

In August, the average sunshine duration in Port-au-Prince is 11.2h.

When is the lowest UV index in Port-au-Prince?

January through May, July through December, with an average maximum UV index of 6, are months with the lowest UV index in Port-au-Prince.

What is the UV index reading in August in Port-au-Prince?

In August, the average daily maximum UV index in Port-au-Prince is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to Sun's UV rays.

Average temperature in August
Port-au-Prince, Haiti

Average temperature in August - Port-au-Prince, Haiti
  • Average high temperature in August: 30.9°C

The warmest month (with the highest average high temperature) is August (30.9°C).
The month with the lowest average high temperature is January (27.6°C).

  • Average low temperature in August: 21.3°C

The months with the highest average low temperature are August and September (21.3°C).
The coldest month (with the lowest average low temperature) is January (18.2°C).

Average pressure in August
Port-au-Prince, Haiti

Average pressure in August - Port-au-Prince, Haiti
  • Average pressure in August: 1014.3mbar

The month with the highest atmospheric pressure is January (1016.3mbar).
The month with the lowest atmospheric pressure is October (1012.5mbar).

Average wind speed in August
Port-au-Prince, Haiti

Average wind speed in August - Port-au-Prince, Haiti
  • Average wind speed in August: 7.6km/h

The windiest month (with the highest average wind speed) is June (9.2km/h).
The calmest month (with the lowest average wind speed) is September (6.5km/h).

Average humidity in August
Port-au-Prince, Haiti

Average humidity in August - Port-au-Prince, Haiti
  • Average humidity in August: 74%

The month with the highest relative humidity is November (80%).
The month with the lowest relative humidity is February (72%).

Average rainfall in August
Port-au-Prince, Haiti

Average rainfall in August - Port-au-Prince, Haiti
  • Average rainfall in August: 111mm

The wettest month (with the highest rainfall) is May (141mm).
The driest month (with the least rainfall) is January (12mm).

Average rainfall days in August
Port-au-Prince, Haiti

Average rainfall days in August - Port-au-Prince, Haiti
  • Average rainfall days in August: 22.2 days

The months with the highest number of rainy days are April and October (24.4 days).
The month with the least rainy days is January (9.9 days).

Average sea temperature in August
Port-au-Prince, Haiti

Average sea temperature in August - Port-au-Prince, Haiti
  • Average sea temperature in August: 29.5°C

The best month for swimming (with the highest average sea temperature) is September (29.8°C).
The coldest month (with the lowest average sea temperature) is February (26.8°C).

Average daylight in August /
Average sunshine in August
Port-au-Prince, Haiti

Average daylight in August / Average sunshine in August - Port-au-Prince, Haiti
  • 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 0min).

  • Average sunshine in August: 11h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 7h and 12min).

Average sunshine days in August
Port-au-Prince, Haiti

Average sunshine days in August - Port-au-Prince, Haiti
  • Average sunshine days in August: 6 days

The month with the most sunshine days is December (19 days).
The month with the least sunshine days is April (3.3 days).

Average UV index in August
Port-au-Prince, Haiti

Average UV index in August - Port-au-Prince, Haiti
  • Average UV index in August: 6

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 6).

Average cloud cover in August
Port-au-Prince, Haiti

Average cloud cover in August - Port-au-Prince, Haiti
  • Average cloud cover in August: 24

The month with the most cloud cover is April (Cloud cover 35).
The month with the least cloud cover is December (Cloud cover 21).

Average visibility in August
Port-au-Prince, Haiti

Average visibility in August - Port-au-Prince, Haiti
  • Average visibility in August: 9km

The months with the highest visibility are February, March and June (10km).
The months with the lowest visibility are January, April, May, July, August, September, October, November and December (9km).

Port-au-Prince, Haiti

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