May weather forecast
Certitude, French Guiana

May, the last month of the spring in Certitude, is also a moderately hot month, with temperature in the range of an average low of 21.9°C (71.4°F) and an average high of 29.8°C (85.6°F).

Temperature

May's arrival is characterized by an average high-temperature of a still warm 29.8°C (85.6°F), identical to that of April. Throughout May, Certitude anticipates an average low-temperature of 21.9°C (71.4°F).

Heat index

May's heat index is estimated at a scorching 40°C (104°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The most humid month is May, with an average relative humidity of 90%.

Rainfall

The month with the most rainfall is May, when the rain falls for 25.9 days and typically aggregates up to 192mm (7.56") of precipitation.

Daylight

In May, the average length of the day in Certitude, French Guiana, is 12h and 18min.
On the first day of the month, sunrise is at 06:22 and sunset at 18:37. On the last day of May, in Certitude, sunrise is at 06:20 and sunset at 18:40 -03.

Sunshine

In May, the average sunshine in Certitude is 5.1h.

UV index

In May, the average daily maximum UV index in Certitude, French Guiana, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 6 in May leads to these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.