September weather forecast
Junique, French Guiana

The first month of the autumn, September, is still a hot month in Junique, French Guiana, with temperature in the range of an average high of 32.7°C (90.9°F) and an average low of 22.5°C (72.5°F).

Temperature

Junique's September average high-temperature settles at a still hot 32.7°C (90.9°F), showing a near match with the preceding month. The average temperature during September nights is registered at a pleasant 22.5°C (72.5°F).

Heat index

September's average heat index is estimated at a blazing hot 47°C (116.6°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In September, the average relative humidity in Junique is 79%.

Rainfall

In Junique, in September, during 11.5 rainfall days, 26mm (1.02") of precipitation is typically accumulated. Throughout the year, in Junique, French Guiana, there are 253 rainfall days, and 878mm (34.57") of precipitation is accumulated.

Daylight

In Junique, the average length of the day in September is 12h and 9min.
On the first day of September, sunrise is at 06:29 and sunset at 18:42. On the last day of the month, sunrise is at 06:23 and sunset at 18:28 -03.

Sunshine

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

UV index

The months with the highest UV index in Junique are July through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 7 during September leads to these instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.