May weather forecast
Barthélemy, French Guiana

High rainfall marks the weather in Barthélemy in May, soaring to an annual high of 293mm (11.54"), up from April's already high 208mm (8.19"). This month still ensures a pronounced tropical climate, defined by increased precipitation, warmth, and humidity. The abundant rainfall does not impede the daylight, which marginally advances to 12.3 hours. With temperatures persisting in their high range, the warmth complements the humid atmosphere. Thus, May stands out as the wettest month in Barthélemy, amplifying the tropical climate conditions seen earlier in the year.

Temperature

As Barthélemy welcomes May, the average high-temperature stabilizes at a still warm 28.6°C (83.5°F), showing little deviation from April's 28.5°C (83.3°F). A slight dip in temperature to a still moderately hot 24.7°C (76.5°F) marks the average nights during May.

Heat index

The heat index in May is evaluated at a sweltering 35°C (95°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Observations indicate that the heat index values are for shady locations with light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

With an average relative humidity of 86%, May is the most humid month in Barthélemy.

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

The average length of the day in May is 12h and 19min.
On the first day of the month, sunrise is at 06:19 and sunset at 18:35. On the last day of May, in Barthélemy, sunrise is at 06:17 and sunset at 18:38 -03.

Sunshine

In Barthélemy, 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. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in May transforms into the following instructions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.