August weather forecast
John, French Guiana

The last month of the summer, August, is another hot month in John, French Guiana, with an average temperature varying between 32°C (89.6°F) and 22.3°C (72.1°F).

Temperature

August observes an average high-temperature of a still tropical 32°C (89.6°F), marking an insignificant difference from July's 30.6°C (87.1°F). August nights in John cool down to an average low-temperature of 22.3°C (72.1°F).

Heat index

For most parts of August, the heat index is evaluated at a life-threatening hot 45°C (113°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In John, the average relative humidity in August is 82%.

Rainfall

In John, during August, the rain falls for 19 days and regularly aggregates up to 66mm (2.6") of precipitation. Throughout the year, there are 253 rainfall days, and 878mm (34.57") of precipitation is accumulated.

Daylight

In August, the average length of the day in John is 12h and 17min.
On the first day of August in John, French Guiana, sunrise is at 06:30 and sunset at 18:50. On the last day of the month, sunrise is at 06:28 and sunset at 18:40 -03.

Sunshine

In John, the average sunshine in August is 8.7h.

UV index

The months with the highest UV index in John, French Guiana, are July through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 7 translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.