May weather forecast
Petit Cayenne, French Guiana

The last month of the spring, May, is another warm month in Petit Cayenne, French Guiana, with an average temperature fluctuating between 24.7°C (76.5°F) and 28.6°C (83.5°F).

Temperature

The advent of May brings an average high-temperature of a still moderately hot 28.6°C (83.5°F), exhibiting minor difference from the previous month. Nights in May in Petit Cayenne showcase an average temperature of 24.7°C (76.5°F), slightly cooler than the daytime.

Heat index

May's heat index is evaluated at a sweltering 35°C (95°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry 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

May is the most humid month, with an average relative humidity of 86%.

Rainfall

The month with the most rainfall is May, when the rain falls for 28.9 days and typically aggregates up to 293mm (11.54") of precipitation.

Daylight

In Petit Cayenne, French Guiana, the average length of the day in May is 12h and 21min.
On the first day of May, sunrise is at 06:17 and sunset at 18:35. On the last day of the month, sunrise is at 06:15 and sunset at 18:39 -03.

Sunshine

In Petit Cayenne, the average sunshine in May is 6.9h.

UV index

January through May and December, with an average maximum UV index of 6, are months with the lowest UV index in Petit Cayenne, French Guiana. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.