September weather forecast
Cacao, French Guiana

In September, the rainfall shows a further decrease, reaching a record low of 23mm (0.91") for the year in Cacao. Temperatures remain high at 31.5°C (88.7°F), maintaining the warm climate of the town. A slight increase in wind speed helps to mitigate the heat, resulting in pleasant weather conditions overall. Moreover, the daylight hours begin to reduce slowly, signaling the approach of the year-end. With the retreat of the monsoon, drier weather conditions set in.

Temperature

As August turns into September, the average high-temperatures rest at a still hot 31.5°C (88.7°F), showing a minor variation from the prior month. During the month of September, Cacao experiences a steady low-temperature average of 24.5°C (76.1°F).

Heat index

The heat index value for September is evaluated at a scorching 41°C (105.8°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The months with the lowest humidity in Cacao are September and October, with an average relative humidity of 76%.

Rainfall

The month with the least rainfall in Cacao, French Guiana, is September, when the rain falls for 12.2 days and typically collects 23mm (0.91") of precipitation.

Daylight

In September, the average length of the day in Cacao is 12h and 8min.
On the first day of the month, sunrise is at 06:23 and sunset at 18:35. On the last day of September, sunrise is at 06:17 and sunset at 18:22 -03.

Sunshine

The month with the most sunshine is September, with an average of 9.2h of sunshine.

UV index

June through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.