September weather forecast
Grande Ravine, Haiti

September

Weather in September

September, the first month of the autumn in Grande Ravine, is also a moderately hot month, with temperature in the range of an average high of 29.8°C (85.6°F) and an average low of 21.3°C (70.3°F).

Temperature

Grande Ravine experiences a recorded average high-temperature of a moderately hot 29.8°C (85.6°F) in September, closely aligned with August's 30.9°C (87.6°F). Throughout September, an average nighttime temperature of 21.3°C (70.3°F) is experienced in Grande Ravine.

Heat index

Throughout September, the heat index is evaluated at a torrid 36°C (96.8°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in September in Grande Ravine is 77%.

Rainfall

In Grande Ravine, during September, the rain falls for 22.4 days and regularly aggregates up to 135mm (5.31") of precipitation. Throughout the year, there are 227.4 rainfall days, and 904mm (35.59") of precipitation is accumulated.

Daylight

The average length of the day in September in Grande Ravine is 12h and 14min.
On the first day of September in Grande Ravine, sunrise is at 06:34 and sunset at 19:02. On the last day of the month, sunrise is at 06:38 and sunset at 18:37 EDT.

Sunshine

The average sunshine in September in Grande Ravine is 9.6h.

UV index

The months with the lowest UV index in Grande Ravine, Haiti, are January through May, July through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 6 in September translates into these instructions:
Shun overexposure. Protection from sun ravages is indispensable. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.

Frequently asked questions

How hot does it get in Grande Ravine in September?
The high-temperature, in September, in Grande Ravine, is 29.8°C (85.6°F), while the low-temperature averages to 21.3°C (70.3°F). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 36°C (96.8°F).
What is the average humidity in September in Grande Ravine?
The average relative humidity in September in Grande Ravine, Haiti, is 77%.
How many days does it rain in September in Grande Ravine?
In Grande Ravine, Haiti, in September, during 22.4 rainfall days, 135mm (5.31") of precipitation is typically accumulated.
How many hours of daylight does Grande Ravine have in September?
In September, the average day length in Grande Ravine, Haiti, is 12h and 14min.
What time are sunrise and sunset in September in Grande Ravine?
In September, on the first day of the month, sunrise is at 06:34 and sunset at 19:02. On the last day of the month, in Grande Ravine, sunrise is at 06:38 and sunset at 18:37 EDT.
How many hours of sunshine does Grande Ravine have in September?
In September, the average sunshine duration in Grande Ravine, Haiti, is 9.6h.
What is the month with the lowest UV index in Grande Ravine?
The months with the lowest UV index in Grande Ravine are January through May, July through December, with an average maximum UV index of 6.
What is the UV index reading in September in Grande Ravine?
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Grande Ravine, Haiti
Average temperature in September
Grande Ravine, Haiti
  • Average high temperature in September: 29.8°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 September: 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 September - Grande Ravine, Haiti
Average pressure in September
Grande Ravine, Haiti
  • Average pressure in September: 1013.2mbar

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 September - Grande Ravine, Haiti
Average wind speed in September
Grande Ravine, Haiti
  • Average wind speed in September: 6.5km/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 September - Grande Ravine, Haiti
Average humidity in September
Grande Ravine, Haiti
  • Average humidity in September: 77%

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

Average rainfall in September - Grande Ravine, Haiti
Average rainfall in September
Grande Ravine, Haiti
  • Average rainfall in September: 135mm

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

Average rainfall days in September - Grande Ravine, Haiti
Average rainfall days in September
Grande Ravine, Haiti
  • Average rainfall days in September: 22.4 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 daylight in September / Average sunshine in September - Grande Ravine, Haiti
Average daylight in September /
Average sunshine in September
Grande Ravine, 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 4min

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 September - Grande Ravine, Haiti
Average sunshine days in September
Grande Ravine, Haiti
  • Average sunshine days in September: 4.7 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 September - Grande Ravine, Haiti
Average UV index in September
Grande Ravine, Haiti
  • Average UV index in September: 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 September - Grande Ravine, Haiti
Average cloud cover in September
Grande Ravine, Haiti
  • Average cloud cover in September: 27

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 September - Grande Ravine, Haiti
Average visibility in September
Grande Ravine, Haiti
  • Average visibility in September: 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).

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