September weather forecast
Dégrad Yaya, French Guiana

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

Temperature

Dégrad Yaya's weather in September, with an average high-temperature of a still tropical 34.3°C (93.7°F), subtly shifts from August's 33°C (91.4°F). During September, Dégrad Yaya reports a marked contrast from daily peak temperatures, with an average nighttime reading of 21.1°C (70°F).

Heat index

Throughout September, the heat index is appraised at a life-threatening hot 51°C (123.8°F). Be cautious: Heat exhaustion along with heat cramps are predicted. Heatstroke is a possible consequence of continuous physical effort.
Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In September, the average relative humidity is 75%.

Rainfall

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

Daylight

The average length of the day in September in Dégrad Yaya is 12h and 8min.
On the first day of September, sunrise is at 06:31 and sunset at 18:43. On the last day of the month, sunrise is at 06:24 and sunset at 18:29 -03.

Sunshine

The month with the most sunshine in Dégrad Yaya, French Guiana, is September, with an average of 9.1h of sunshine.

UV index

The months with the highest UV index in Dégrad Yaya are July through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 7 during September leads to these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.