June weather forecast
Barthélemy, French Guiana

A pleasant reprieve characterizes the weather in June in Barthélemy with a significant drop in rainfall from the previous month's peak, decreasing to 234mm (9.21"). While the city remains warm and humid, the rainfall's easing signals the onset of a slightly dryer period. UV index rises to 7, the highest till this point of the year, indicative of brighter, sunnier days. The wind speed drops, reducing the cooling effect it normally provides. The month of June in Barthélemy marks the start of a phase with reduced rain, though it retains the prevalent warm and humid conditions.

Temperature

The average high-temperature is a still warm 28.8°C (83.8°F) in June, hardly different from the 28.6°C (83.5°F) recorded in May. During the nights of June, Barthélemy records an average low-temperature of 23.8°C (74.8°F), reflecting a modest decrease from daytime highs.

Heat index

For most parts of June, the heat index is evaluated at a sweltering 35°C (95°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. 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 remain especially vital for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in June is 84%.

Rainfall

In June, the rain falls for 28.2 days. Throughout June, 234mm (9.21") of precipitation is accumulated. Throughout the year, in Barthélemy, there are 277 rainfall days, and 1707mm (67.2") of precipitation is accumulated.

Daylight

With an average of 12h and 24min of daylight, June has the longest days of the year.
On the first day of June in Barthélemy, sunrise is at 06:17 and sunset at 18:38. On the last day of the month, sunrise is at 06:23 and sunset at 18:44 -03.

Sunshine

In Barthélemy, the average sunshine in June is 7.5h.

UV index

The months with the highest UV index are June through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In June, the average maximum UV index of 7 translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.