September weather forecast
Jean-Rabel, Haiti

The first month of the autumn, September, is still a warm month in Jean-Rabel, Haiti, with an average temperature fluctuating between 23.1°C (73.6°F) and 29.8°C (85.6°F).

Temperature

Jean-Rabel, Haiti, registers an average high-temperature of a warm 29.8°C (85.6°F) at the commencement of September, closely related to the preceding month. In September, Jean-Rabel experiences an average nighttime temperature of 23.1°C (73.6°F).

Heat index

In September, the heat index is calculated to be a very hot 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Jean-Rabel, the average relative humidity in September is 79%.

Rainfall

In September, the rain falls for 23.6 days. Throughout September, 101mm (3.98") of precipitation is accumulated. In Jean-Rabel, during the entire year, the rain falls for 219.6 days and collects up to 736mm (28.98") of precipitation.

Daylight

In Jean-Rabel, the average length of the day in September is 12h and 15min.
On the first day of the month, sunrise is at 06:37 and sunset at 19:07. On the last day of September, in Jean-Rabel, sunrise is at 06:43 and sunset at 18:41 EDT.

Sunshine

In September, the average sunshine is 10.1h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index in Jean-Rabel. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 7 during September leads to these instructions:
Fend off overexposure. Sun protection is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.