May weather forecast
Alcântara, Brazil

The last month of the autumn, May, is another warm month in Alcântara, Brazil, with an average temperature varying between 24.8°C (76.6°F) and 29.3°C (84.7°F).

Temperature

The commencement of May brings an average high-temperature of a still moderately hot 29.3°C (84.7°F), marking an inconsequential divergence from April. During May's nights, Alcântara notes a minor temperature decline, reaching an average of 24.8°C (76.6°F).

Heat index

The heat index for May is estimated at a torrid 37°C (98.6°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

April and May, with an average relative humidity of 84%, are the most humid months in Alcântara.

Rainfall

In Alcântara, in May, it is raining for 29.7 days, with typically 333mm (13.11") of accumulated precipitation. Throughout the year, in Alcântara, there are 291.1 rainfall days, and 2596mm (102.2") of precipitation is accumulated.

Sea temperature

In Alcântara, the average seawater temperature in May is 28.8°C (83.8°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.

Daylight

In May, the average length of the day in Alcântara is 12h and 1min.
On the first day of the month, sunrise is at 05:53 and sunset at 17:55. On the last day of May, in Alcântara, sunrise is at 05:55 and sunset at 17:55 -03.

Sunshine

In Alcântara, the average sunshine in May is 7.9h.

UV index

The months with the lowest UV index in Alcântara are January through March, May and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 6 during May translates into these guidelines:
Deflect overexposure. Sun protection is a necessity. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take caution! The UV rays from the Sun gain strength from sand and water reflections.