September weather forecast
Gaston, French Guiana

September, the first month of the autumn in Gaston, is still a hot month, with temperature in the range of an average high of 33.6°C (92.5°F) and an average low of 22°C (71.6°F).

Temperature

September begins with an average high-temperature of a still tropical 33.6°C (92.5°F), reflecting close similarity to the preceding month. Gaston experiences a consistent average temperature of 22°C (71.6°F) throughout the nights in September.

Heat index

The heat index value during September is appraised at a blazing hot 48°C (118.4°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important 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.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

The average relative humidity in September is 76%.

Rainfall

In September, the rain falls for 11.8 days. Throughout September, 21mm (0.83") of precipitation is accumulated. Throughout the year, in Gaston, there are 280.4 rainfall days, and 1281mm (50.43") of precipitation is accumulated.

Daylight

In September, the average length of the day in Gaston is 12h and 8min.
On the first day of the month, sunrise is at 06:22 and sunset at 18:34. On the last day of September, in Gaston, sunrise is at 06:15 and sunset at 18:20 -03.

Sunshine

The month with the most sunshine is September, with an average of 8.8h of sunshine.

UV index

The months with the highest UV index are July through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.