May weather forecast
Grand-Santi, French Guiana

May introduces Grand-Santi, French Guiana with warmer temperatures, signaling the pre-summer phase. Observing diversified climatic patterns, this month retains a moderate pressure rate of 1012.1mb. However, there is a considerable increase in humidity, which might lead to discomfort. The UV index remains at 6, necessitating UV protective measures during mid-day. The greatest shift in the weather during May is the rise in rainfall, towering at 171mm (6.73"), showcasing the highest precipitation throughout the year.

Temperature

With the start of May, Grand-Santi measures an average high-temperature of a still tropical 30.1°C (86.2°F), not significantly differing from April's 30.2°C (86.4°F). Throughout May nights, Grand-Santi experiences a consistent temperature average of 22°C (71.6°F).

Heat index

For most parts of May, the heat index is calculated to be a scorching 41°C (105.8°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index determinations are made taking into account the shade and light air movements. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

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

Rainfall

The month with the most rainfall in Grand-Santi is May, when the rain falls for 26.3 days and typically aggregates up to 171mm (6.73") of precipitation.

Daylight

In May, the average length of the day in Grand-Santi is 12h and 19min.
On the first day of the month, sunrise is at 06:26 and sunset at 18:42. On the last day of May, in Grand-Santi, sunrise is at 06:24 and sunset at 18:45 -03.

Sunshine

In Grand-Santi, the average sunshine in May is 5.5h.

UV index

In May, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 during May translates into the following guidance:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.