September weather forecast
Gressier, Haiti

September's weather in Gressier offers a respite as temperatures begin to dip while retaining the tropical charm. This subtle drop in temperature, a transition from the hot August to the cooler October, provides a relief to residents and tourists. September ranks high on the rainfall scale with an average precipitation of 135mm (5.31"), maintaining the humidity in the region. Despite the high rainfall, the sea temperature indicates a warm aquatic environment ideal for various water activities. The steady daylight hours and ample sunshine, even though slightly reduced, support a wide range of outdoor activities.

Temperature

The start of September in Gressier sees the average high-temperature at a warm 29.8°C (85.6°F), showing little difference from August's 30.9°C (87.6°F). The average low-temperature of 21.3°C (70.3°F) is witnessed in Gressier during September.

Heat index

September's average heat index is evaluated at a fiery hot 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Gressier, the average relative humidity in September is 77%.

Rainfall

In Gressier, in September, during 22.4 rainfall days, 135mm (5.31") of precipitation is typically accumulated. In Gressier, Haiti, during the entire year, the rain falls for 227.4 days and collects up to 904mm (35.59") of precipitation.

Sea temperature

The month with the warmest seawater is September, with an average sea temperature of 29.9°C (85.8°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

In Gressier, the average length of the day in September is 12h and 14min.
On the first day of September in Gressier, 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 in Gressier is 9.6h.

UV index

The months with the lowest UV index in Gressier 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 hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 6 during September translates into the following guidance:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be mindful! Sand and water reflections can up the Sun's UV exposure.