October weather forecast
Barthélemy, French Guiana

October presents a reversal in the weather in Barthélemy with a slight increase in rainfall to 26mm (1.02"), breaking the dry spell observed from June to September. As the rainfall picks up, temperatures also take an upward turn, creating the perfect tropical setting as we approach the year's end. Daylight hours and humidity hold steady, maintaining the city's warm and humid environment. The wind's speed stands unchanged from the previous month enforcing the consistency of Barthélemy's tropical weather. Hence, October subtly shifts the weather pattern from dry to slightly wetter while retaining the tropical ambience.

Temperature

October, on average, is the warmest month in Barthélemy, registering a high temperature of 31.6°C (88.9°F) and a low of 24.8°C (76.6°F).

Heat index

The heat index value during October is evaluated at an extremely hot 41°C (105.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

September and October, with an average relative humidity of 76%, are the least humid months.

Rainfall

In October, the rain falls for 11.6 days. Throughout October, 26mm (1.02") of precipitation is accumulated. In Barthélemy, during the entire year, the rain falls for 277 days and collects up to 1707mm (67.2") of precipitation.

Daylight

The average length of the day in October is 12h and 2min.
On the first day of the month, sunrise is at 06:17 and sunset at 18:21. On the last day of October, sunrise is at 06:14 and sunset at 18:12 -03.

Sunshine

In Barthélemy, the average sunshine in October is 9.1h.

UV index

The months with the highest UV index in Barthélemy are June through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: An average UV index of 7 in October transforms into this advice:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.