September weather forecast
Sandy Bay, Jamaica

September at Sandy Bay experiences a slight drop in temperature and an increase in rainfall levels. Consequently, the climate remains chiefly consistent with the preceding summer months. The sea temperature reaches the annual peak, offering an additional allure for beachgoers. Fair wind blowing across the bay keeps the increasing humidity levels at comfort. Outdoor and water activities continue to be prime attractions throughout this period.

Temperature

The start of September marks an average high-temperature of a still warm 29.5°C (85.1°F), hardly distinguishable from the conditions in August. September introduces a small decrease to a nighttime average of 26.7°C (80.1°F) in Sandy Bay.

Heat index

The heat index value during September is computed to be a very hot 35°C (95°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in September in Sandy Bay, Jamaica, is 76%.

Rainfall

In Sandy Bay, Jamaica, during September, the rain falls for 18.4 days and regularly aggregates up to 88mm (3.46") of precipitation. Throughout the year, in Sandy Bay, there are 177.2 rainfall days, and 687mm (27.05") of precipitation is accumulated.

Sea temperature

The months with the warmest seawater are August and September, with an average sea temperature of 29.8°C (85.6°F).
Note: Between the temperatures of 25°C (77°F) and 29°C (84.2°F), water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September in Sandy Bay, sunrise is at 05:57 and sunset at 18:26. On the last day of the month, sunrise is at 06:02 and sunset at 18:01 EST.

Sunshine

The average sunshine in September in Sandy Bay is 10.3h.

UV index

The months with the highest UV index are January, March through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Note! Reflective surfaces like sand and water heighten the UV radiation levels.