September weather forecastValide, French Guiana

Weather in September

September, the first month of the autumn in Valide, is also a hot month, with an average temperature varying between 20.5°C (68.9°F) and 34.1°C (93.4°F).

Temperature

September's arrival shows an average high-temperature of a still hot 34.1°C (93.4°F), hardly different from the previous month. Valide's average low-temperature of 20.5°C (68.9°F) in September reflects a significant disparity from the daytime highs.

Heat index

Throughout September, the heat index is appraised at a burning hot 49°C (120.2°F). Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In September, the average relative humidity is 74%.

Rainfall

In September, in Valide, the rain falls for 14.3 days. Throughout September, 36mm (1.42") of precipitation is accumulated. Throughout the year, there are 265.5 rainfall days, and 1078mm (42.44") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 8min.
On the first day of the month, sunrise is at 06:27 and sunset at 18:38. On the last day of September, in Valide, French Guiana, sunrise is at 06:20 and sunset at 18:25 -03.

Sunshine

September and October, with an average of 8.8h of sunshine, are months with the most sunshine in Valide, 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 value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.