June weather forecast
John, French Guiana

The first month of the summer, June, is still a warm month in John, French Guiana, with an average temperature fluctuating between 29.5°C (85.1°F) and 22.8°C (73°F).

Temperature

June reports an average high-temperature of a still warm 29.5°C (85.1°F), matching the temperature of May. June witnesses an average low-temperature hovering around an agreeable 22.8°C (73°F).

Heat index

The heat index in June is evaluated at a very hot 38°C (100.4°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

With an average relative humidity of 88%, June is the most humid month.

Rainfall

In June, the rain falls for 25.6 days. Throughout June, 135mm (5.31") of precipitation is accumulated. In John, French Guiana, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

June has the longest days of the year in John, French Guiana, with an average of 12h and 24min of daylight.
On the first day of June, sunrise is at 06:20 and sunset at 18:44. On the last day of the month, sunrise is at 06:25 and sunset at 18:50 -03.

Sunshine

In June, the average sunshine in John, French Guiana, is 7.1h.

UV index

January through June and December, with an average maximum UV index of 6, are months with the lowest UV index in John, French Guiana. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: A daily high UV index of 6 in June leads to these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.