September weather forecast
Dégrad Fourmi, French Guiana

September, the first month of the autumn in Dégrad Fourmi, is still a tropical month, with an average temperature varying between 20.5°C (68.9°F) and 34.1°C (93.4°F).

Temperature

The transition into September notes an average high-temperature of a still hot 34.1°C (93.4°F), revealing a mild distinction from the 32.8°C (91°F) in August. A noticeable downturn in temperature characterizes the September nights in Dégrad Fourmi, French Guiana, averaging at an agreeable 20.5°C (68.9°F).

Heat index

In September, the heat index is evaluated at a burning hot 49°C (120.2°F). Observe: Heat exhaustion and heat cramps are probable. Heatstroke is on the horizon with prolonged exertion.
Heat index readings emphasize conditions of light breezes and shaded spots. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in September in Dégrad Fourmi is 74%.

Rainfall

In Dégrad Fourmi, in September, during 14.3 rainfall days, 36mm (1.42") of precipitation is typically accumulated. In Dégrad Fourmi, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.

Daylight

In September, the average length of the day in Dégrad Fourmi is 12h and 8min.
On the first day of September in Dégrad Fourmi, sunrise is at 06:28 and sunset at 18:39. On the last day of the month, sunrise is at 06:21 and sunset at 18:26 -03.

Sunshine

The months with the most sunshine are September and October, with an average of 8.8h of sunshine.

UV index

The months with the highest UV index are August through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.