May weather forecast
Saint-Marc, Haiti

Moving into May, Saint-Marc continues to warm up, experiencing an uptick in temperature. The daylight hours peak to their highest at 13 hours, allowing plenty of time to soak up the sun. Notably, May records the highest rainfall of the year, with a steep increase to 118mm (4.65") compared to April's 50mm (1.97"). This heavy rainfall makes May the wettest month, yet it does not overshadow the warm temperatures and lengthy daylight hours.

Temperature

The shift into May reveals an average high-temperature of a still warm 29.3°C (84.7°F), closely mirroring April's climate. Saint-Marc usually reports an average low-temperature of 22.5°C (72.5°F) during the month of May.

Heat index

During May, the heat index is estimated at a very hot 35°C (95°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In May, the average relative humidity in Saint-Marc is 76%.

Rainfall

The month with the most rainfall in Saint-Marc is May, when the rain falls for 25.3 days and typically aggregates up to 118mm (4.65") of precipitation.

Sea temperature

In May, the average sea temperature in Saint-Marc is 28°C (82.4°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

In May, the average length of the day is 13h and 2min.
On the first day of May, sunrise is at 06:22 and sunset at 19:13. On the last day of the month, sunrise is at 06:12 and sunset at 19:24 EDT.

Sunshine

The average sunshine in May is 10.6h.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 7 during May leads to these advisories:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.