July weather forecast
Barthélemy, French Guiana

July in Barthélemy witnesses a further decrease in rainfall, stepping down to 133mm (5.24"), continuing the downward trend from June. Despite this decline in precipitation, the tropical climate persists unhindered because of the warm temperature range and high humidity. Notably, the UV index remains at 7, the year's peak, suggesting the presence of generous sunshine during the day. The city experiences a decline in relative humidity, providing some relief from the previously oppressive humid conditions. Therefore, the weather in July in Barthélemy manifests as a variation of the tropical theme, marked by a decrease in rainfall and a peak UV index.

Temperature

July's average high-temperature stands at a still moderately hot 29.8°C (85.6°F), showing little deviation from June's 28.8°C (83.8°F). Throughout the month of July, Barthélemy sees a steady low-temperature average of 23.8°C (74.8°F).

Heat index

The heat index in July is evaluated at a torrid 37°C (98.6°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. 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 particularly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Barthélemy, French Guiana, the average relative humidity in July is 81%.

Rainfall

In Barthélemy, French Guiana, in July, during 26.6 rainfall days, 133mm (5.24") of precipitation is typically accumulated. Throughout the year, in Barthélemy, there are 277 rainfall days, and 1707mm (67.2") of precipitation is accumulated.

Daylight

In Barthélemy, French Guiana, the average length of the day in July is 12h and 20min.
On the first day of July in Barthélemy, sunrise is at 06:23 and sunset at 18:45. On the last day of the month, sunrise is at 06:27 and sunset at 18:45 -03.

Sunshine

The average sunshine in July is 8.3h.

UV index

June through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 7 in July suggests the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.