May weather forecast
Macapá, Brazil

In May, Macapá experiences a more notable shift towards drier conditions. The daylight duration remains constant, providing enough sunlight for tourists to enjoy. Although humidity levels are still significant, the city sees a noticeable reduction in rainfall. Temperatures marginally rise, though the sea temperature remains constant, maintaining excellent conditions for water sports.

Temperature

The arrival of May brings an average high-temperature of a still warm 29.2°C (84.6°F), subtly diverging from April's 28.8°C (83.8°F). Macapá's May nights experience a subtle temperature dip to an average of 24.6°C (76.3°F).

Heat index

For May, the heat index is evaluated at a fiery hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Heat index evaluations are typically in the context of light winds and shaded environments. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In May, the average relative humidity in Macapá is 85%.

Rainfall

In May, the rain falls for 28.8 days. Throughout May, 330mm (12.99") of precipitation is accumulated. In Macapá, during the entire year, the rain falls for 280.7 days and collects up to 2496mm (98.27") of precipitation.

Sea temperature

In May, the average sea temperature in Macapá is 27.9°C (82.2°F).
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In Macapá, the average length of the day in May is 12h and 7min.
On the first day of May in Macapá, sunrise is at 06:17 and sunset at 18:24. On the last day of the month, sunrise is at 06:18 and sunset at 18:25 -03.

Sunshine

In May, the average sunshine in Macapá is 6.9h.

UV index

The months with the highest UV index are May through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In May, a daily maximum UV index of 7 leads to the following instructions:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.