May weather forecast
São João de Pirabas, Brazil

The last month of the autumn, May, is a hot month in São João de Pirabas, Brazil, with an average temperature fluctuating between 22.6°C (72.7°F) and 30.4°C (86.7°F).

Temperature

In May, São João de Pirabas's weather conditions record an average high-temperature of a tropical 30.4°C (86.7°F), demonstrating little divergence from the preceding month. São João de Pirabas experiences an average temperature drop to a pleasant 22.6°C (72.7°F) during May nights.

Heat index

The heat index value for May is estimated at a blisteringly hot 42°C (107.6°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. 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. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the highest humidity in São João de Pirabas are April and May, with an average relative humidity of 90%.

Rainfall

In São João de Pirabas, in May, it is raining for 29.2 days, with typically 147mm (5.79") of accumulated precipitation. In São João de Pirabas, during the entire year, the rain falls for 307.3 days and collects up to 1390mm (54.72") of precipitation.

Sea temperature

The months with the warmest seawater are January, March through May, with an average sea temperature of 28.8°C (83.8°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In May, the average length of the day in São João de Pirabas is 12h and 5min.
On the first day of the month, sunrise is at 06:03 and sunset at 18:08. On the last day of May, in São João de Pirabas, sunrise is at 06:04 and sunset at 18:08 -03.

Sunshine

The average sunshine in May is 6.9h.

UV index

The months with the lowest UV index are January through June, August, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 6 during May translates into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! Reflecting off water and sand, UV rays are much stronger.