September weather forecast
Passe, Haiti

September, the first month of the autumn in Passe, is still a warm month, with an average temperature fluctuating between 21.3°C (70.3°F) and 29.8°C (85.6°F).

Temperature

September's arrival registers an average high-temperature of a moderately hot 29.8°C (85.6°F), closely aligning with the temperature of the previous month. In September, Passe experiences an average nighttime temperature of 21.3°C (70.3°F).

Heat index

September's mean heat index is calculated to be a very hot 36°C (96.8°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The average relative humidity in September in Passe is 77%.

Rainfall

In Passe, Haiti, 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

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

UV index

January through May, July through December, with an average maximum UV index of 6, are months with the lowest UV index in Passe. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.