June weather forecast
Bienvenue, French Guiana

The first month of the summer, June, is still a warm month in Bienvenue, French Guiana, with an average temperature ranging between max 29.3°C (84.7°F) and min 21.8°C (71.2°F).

Temperature

In June, the average high-temperature is essentially the same as in May - a still moderately hot 29.3°C (84.7°F). The average low-temperature, in June, is 21.8°C (71.2°F).

Heat index

In June, the average heat index is calculated to be a sweltering 38°C (100.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like wind, metabolic differences, clothing, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 June, the average relative humidity is 89%.

Rainfall

In Bienvenue, French Guiana, during June, the rain falls for 26.6 days and regularly aggregates up to 133mm (5.24") of precipitation. Throughout the year, in Bienvenue, French Guiana, there are 270.6 rainfall days, and 1131mm (44.53") of precipitation is accumulated.

Daylight

With an average of 12h and 18min of daylight, June has the longest days of the year.
On the first day of June, sunrise is at 06:19 and sunset at 18:37. On the last day of the month, sunrise is at 06:25 and sunset at 18:43 -03.

Sunshine

In June, the average sunshine in Bienvenue is 6.8h.

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 estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in June interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.