July weather forecast
Bienvenue, French Guiana

July brings a remarkable drop in both humidity and rainfall, indicating a shift towards a drier environment in Bienvenue. Sunshine hours increase slightly, inviting more sunlight into the cityscape. The UV index rises to 7, implying an intensified sun's energy, reminding residents to adhere to sun protection measures. While atmospheric pressure remains steadfast, the winds quicken their pace, offering cool relief during warmer afternoons.

Temperature

The shift into July finds Bienvenue at an average high-temperature of a tropical 30.3°C (86.5°F), closely comparable to June's conditions. Bienvenue in July anticipates an average nighttime temperature of 21.3°C (70.3°F).

Heat index

In July, the heat index is computed to be a scorching 41°C (105.8°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In July, the average relative humidity is 86%.

Rainfall

In Bienvenue, in July, it is raining for 26.8 days, with typically 99mm (3.9") of accumulated precipitation. In Bienvenue, during the entire year, the rain falls for 270.6 days and collects up to 1131mm (44.53") of precipitation.

Daylight

The average length of the day in July is 12h and 17min.
On the first day of July in Bienvenue, sunrise is at 06:25 and sunset at 18:43. On the last day of the month, sunrise is at 06:29 and sunset at 18:44 -03.

Sunshine

In Bienvenue, the average sunshine in July is 7.4h.

UV index

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Bienvenue. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in July translates into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.