September weather forecast
Jacmel, Haiti

englishespañol中文
Share

Weather in September

September in Jacmel retains warm tropical conditions with continued heavy rainfall. Rainfall remains more or less the same as August, registering at 71mm (2.8"). Despite the humidity and the prospect of showers, the warming sea temperatures persist, ensuring that coastal water activities remain favorable. The city retains its charm despite the wetter conditions, promising an enriching experience for those who do not mind a bit of tropical rain.

Temperature

In September, Jacmel experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 29.7°C (85.5°F) in August to a still moderately hot 29.3°C (84.7°F). An average low-temperature of 25.3°C (77.5°F), slightly less than the daytime peak, marks the month of September.

Heat index

September's heat index is computed to be a torrid 35°C (95°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In Jacmel, the average relative humidity in September is 76%.

Rainfall

In Jacmel, in September, it is raining for 19.3 days, with typically 71mm (2.8") of accumulated precipitation. In Jacmel, during the entire year, the rain falls for 196.7 days and collects up to 531mm (20.91") of precipitation.

Sea temperature

With an average sea temperature of 29.6°C (85.3°F), September is the month with the warmest seawater.
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In Jacmel, Haiti, the average length of the day in September is 12h and 14min.
On the first day of September, sunrise is at 06:35 and sunset at 19:04. On the last day of the month, sunrise is at 06:40 and sunset at 18:39 EDT.

Sunshine

The average sunshine in September is 9.9h.

UV index

January, March through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 in September translates into this advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.

Frequently asked questions

Is it hot during September?

The high-temperature during September is 29.3°C (84.7°F) and the low-temperature is 25.3°C (77.5°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is computed to be 35°C (95°F).

What is the average humidity in September?

The average relative humidity in September is 76%.

How many days does it rain in September?

In Jacmel, during September, the rain falls for 19.3 days and regularly aggregates up to 71mm (2.8") of precipitation.

What month is the sea warmest?

September is the month with the warmest seawater, with an average sea temperature of 29.6°C (85.3°F).

What is the sea water temperature in September?

In Jacmel, in September, the average water temperature is 29.6°C (85.3°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 Jacmel, the average day length in September is 12h and 14min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 06:35 and sunset at 19:04. On the last day of the month, sunrise is at 06:40 and sunset at 18:39 EDT.

How many hours of sunshine does Jacmel have in September?

In September, the average sunshine duration is 9.9h.

When is the highest UV index?

January, March through October, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index reading in September?

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

Average temperature in September
Jacmel, Haiti

Average temperature in September - Jacmel, Haiti
  • Average high temperature in September: 29.3°C

The warmest month (with the highest average high temperature) is August (29.7°C).
The months with the lowest average high temperature are January, February and March (27.2°C).

  • Average low temperature in September: 25.3°C

The month with the highest average low temperature is September (25.3°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).

Average pressure in September
Jacmel, Haiti

Average pressure in September - Jacmel, Haiti
  • Average pressure in September: 1012.9mbar

The month with the highest atmospheric pressure is January (1016mbar).
The month with the lowest atmospheric pressure is October (1012.2mbar).

Average wind speed in September
Jacmel, Haiti

Average wind speed in September - Jacmel, Haiti
  • Average wind speed in September: 10.2km/h

The windiest month (with the highest average wind speed) is June (15.3km/h).
The calmest month (with the lowest average wind speed) is November (8.8km/h).

Average humidity in September
Jacmel, Haiti

Average humidity in September - Jacmel, Haiti
  • Average humidity in September: 76%

The month with the highest relative humidity is October (77%).
The month with the lowest relative humidity is February (72%).

Average rainfall in September
Jacmel, Haiti

Average rainfall in September - Jacmel, Haiti
  • Average rainfall in September: 71mm

The wettest month (with the highest rainfall) is October (75mm).
The driest month (with the least rainfall) is January (10mm).

Average rainfall days in September
Jacmel, Haiti

Average rainfall days in September - Jacmel, Haiti
  • Average rainfall days in September: 19.3 days

The month with the highest number of rainy days is October (20.7 days).
The month with the least rainy days is January (9.3 days).

Average sea temperature in September
Jacmel, Haiti

Average sea temperature in September - Jacmel, Haiti
  • Average sea temperature in September: 29.6°C

The best month for swimming (with the highest average sea temperature) is September (29.6°C).
The coldest month (with the lowest average sea temperature) is February (26.9°C).

Average daylight in September /
Average sunshine in September
Jacmel, Haiti

Average daylight in September / Average sunshine in September - Jacmel, Haiti
  • Average daylight in September: 12h and 1min

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 September: 9h and 5min

The months with the most sunshine are May, June, July and August (Average sunshine: 11h and 24min).
The month with the least sunshine is February (Average sunshine: 7h and 24min).

Average sunshine days in September
Jacmel, Haiti

Average sunshine days in September - Jacmel, Haiti
  • Average sunshine days in September: 7.9 days

The month with the most sunshine days is December (18.7 days).
The month with the least sunshine days is April (6.7 days).

Average UV index in September
Jacmel, Haiti

Average UV index in September - Jacmel, Haiti
  • Average UV index in September: 7

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

Average cloud cover in September
Jacmel, Haiti

Average cloud cover in September - Jacmel, Haiti
  • Average cloud cover in September: 21

The month with the most cloud cover is April (Cloud cover 30).
The month with the least cloud cover is December (Cloud cover 16).

Average visibility in September
Jacmel, Haiti

Average visibility in September - Jacmel, Haiti
  • Average visibility in September: 10km

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

Jacmel, Haiti

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location