September weather forecast
Élysée, French Guiana

September, the first month of the autumn in Élysée, is also a hot month, with temperature in the range of an average high of 34.3°C (93.7°F) and an average low of 21.1°C (70°F).

Temperature

The advent of September signifies a minor shift to an average high-temperature of a still tropical 34.3°C (93.7°F), aligning closely with August. Despite higher daytime temperatures, nighttime averages fall to an agreeable 21.1°C (70°F) in September.

Heat index

September's heat index is computed to be a life-threatening hot 51°C (123.8°F). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Élysée, the average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall in Élysée. Rain falls for 10.3 days and accumulates 18mm (0.71") of precipitation.

Daylight

In Élysée, the average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 06:29 and sunset at 18:42. On the last day of September, sunrise is at 06:23 and sunset at 18:28 -03.

Sunshine

The month with the most sunshine is September, with an average of 9.1h of sunshine.

UV index

The months with the highest UV index in Élysée are July through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.