September weather forecast
Wempi, French Guiana

September highlights a significant shift in Wempi's weather with a rise in daytime temperature reaching a high point of 34.1°C (93.4°F). Rainfall and humidity greatly reduce during this period. As the rainy season fades away, the city begins to dry up. Sunrays are more direct and the weather becomes generally more conducive for outdoor activities, in spite of the high temperatures.

Temperature

The average high-temperature in Wempi during September registers at a still tropical 34.1°C (93.4°F), maintaining a close resemblance to the previous month. Wempi undergoes a major shift from daytime highs, averaging a pleasant 20.5°C (68.9°F) during the night in September.

Heat index

For September, the heat index is computed to be a burning hot 49°C (120.2°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
In reference to the heat index, it's for places in shade and with a slight wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Wempi, the average relative humidity in September is 74%.

Rainfall

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

Daylight

In Wempi, the average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 06:30 and sunset at 18:40. On the last day of September, in Wempi, sunrise is at 06:22 and sunset at 18:28 -03.

Sunshine

September and October, with an average of 8.8h of sunshine, are months with the most sunshine in Wempi, French Guiana.

UV index

The months with the highest UV index are August through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.