Port-au-Prince
Haiti
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Port-au-Prince, Haiti

A view of a stack of structures on a hillside in Port-au-Prince, Haiti
A view of a stack of structures on a hillside in Port-au-Prince, Haiti
The first month of the autumn, September, is also a hot month in Port-au-Prince, Haiti, with average temperature fluctuating between 24°C (75.2°F) and 34°C (93.2°F).

Temperature

In September, the average high-temperature is practically the same as in August - a hot 34°C (93.2°F). In Port-au-Prince, in September, the average low-temperature is 24°C (75.2°F).

Rainfall

In Port-au-Prince, in September, it is raining for 12 days, with typically 175mm (6.9") of accumulated precipitation. In Port-au-Prince, during the entire year, the rain falls for 99 days and collects up to 1353mm (53.3") of precipitation.

Sea temperature

With an average sea temperature of 29.8°C (85.6°F), September is the month with the warmest seawater in Port-au-Prince.
Note: 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.

Daylight

In September, the average length of the day in Port-au-Prince is 12.2h.

Sunshine

In September, the average sunshine in Port-au-Prince, Haiti, is 8.2h.

UV index

Months with the highest UV index in Port-au-Prince are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 12 in September transform into the following instructions:
Take all necessary precautions, as unprotected skin can burn in 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Port-au-Prince?

The average high-temperature, in September, in Port-au-Prince, is 34°C (93.2°F), while the average low-temperature is 24°C (75.2°F).

How much does it rain in Port-au-Prince in September?

In Port-au-Prince, Haiti, in September, it is raining for 12 days, with typically 175mm (6.9") of accumulated precipitation.

What month is the sea warmest in Port-au-Prince?

The month with the warmest seawater in Port-au-Prince is September, with an average sea temperature of 29.8°C (85.6°F).

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

In September, the average sea temperature in Port-au-Prince is 29.8°C (85.6°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 September in Port-au-Prince?

The average length of the day in September in Port-au-Prince, Haiti, is 12.2h.

How long on average sun shines in September in Port-au-Prince?

In Port-au-Prince, Haiti, the average sunshine in September is 8.2h.

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

Months with the highest UV index in Port-au-Prince, Haiti, are March through September, with an average maximum UV index of 12.

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

In Port-au-Prince, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Port-au-Prince, Haiti
  • Average high temperature in September: 34°C

Warmest months (with the highest average high temperature) are June, July and August (35°C).
Months with the lowest average high temperature are January, February and December (31°C).

  • Average low temperature in September: 24°C

The month with the highest average low temperature is July (25°C).
Coldest months (with the lowest average low temperature) are February, March and December (22°C).

Average rainfall in September - Port-au-Prince, Haiti
  • Average rainfall in September: 175mm

The wettest month (with the highest rainfall) is May (231mm).
Driest months (with the lowest rainfall) are January and December (33mm).

Average rainfall days in September - Port-au-Prince, Haiti
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (13 days).
Months with the lowest number of rainy days are January and December (3 days).

Average sea temperature in September - Port-au-Prince, Haiti
  • Average sea temperature in September: 29.8°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 September / Average sunshine in September - Port-au-Prince, Haiti
  • Average daylight in September: 12.2h

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 September: 8.2h

Months with most sunshine are February, April and August (Average sunshine: 9.1h).
Months with least sunshine are June and December (Average sunshine: 7.9).

Average UV index in September - Port-au-Prince, Haiti
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).